diff --git a/tests/fixtures/smtpad-bottom-layer.json b/tests/fixtures/smtpad-bottom-layer.json
new file mode 100644
index 0000000..c01a521
--- /dev/null
+++ b/tests/fixtures/smtpad-bottom-layer.json
@@ -0,0 +1,788 @@
+[
+  {
+    "type": "source_project_metadata",
+    "source_project_metadata_id": "source_project_metadata_0",
+    "software_used_string": "@tscircuit/core@0.0.801"
+  },
+  {
+    "type": "source_group",
+    "source_group_id": "source_group_0",
+    "is_subcircuit": true,
+    "was_automatically_named": true,
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "source_port",
+    "source_port_id": "source_port_0",
+    "name": "pin1",
+    "pin_number": 1,
+    "port_hints": ["pin1", "anode", "pos", "left", "1"],
+    "source_component_id": "source_component_0",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "source_port",
+    "source_port_id": "source_port_1",
+    "name": "pin2",
+    "pin_number": 2,
+    "port_hints": ["pin2", "cathode", "neg", "right", "2"],
+    "source_component_id": "source_component_0",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "source_component",
+    "source_component_id": "source_component_0",
+    "ftype": "simple_resistor",
+    "name": "U1",
+    "supplier_part_numbers": {
+      "jlcpcb": ["C25089", "C138031", "C162907"]
+    },
+    "resistance": 20,
+    "display_resistance": "20Ω",
+    "are_pins_interchangeable": true,
+    "source_group_id": "source_group_0"
+  },
+  {
+    "type": "source_port",
+    "source_port_id": "source_port_2",
+    "name": "pin1",
+    "pin_number": 1,
+    "port_hints": ["pin1", "anode", "pos", "left", "1"],
+    "source_component_id": "source_component_1",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "source_port",
+    "source_port_id": "source_port_3",
+    "name": "pin2",
+    "pin_number": 2,
+    "port_hints": ["pin2", "cathode", "neg", "right", "2"],
+    "source_component_id": "source_component_1",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "source_component",
+    "source_component_id": "source_component_1",
+    "ftype": "simple_resistor",
+    "name": "U2",
+    "supplier_part_numbers": {
+      "jlcpcb": ["C25077", "C2906862", "C25139"]
+    },
+    "resistance": 10,
+    "display_resistance": "10Ω",
+    "are_pins_interchangeable": true,
+    "source_group_id": "source_group_0"
+  },
+  {
+    "type": "source_port",
+    "source_port_id": "source_port_4",
+    "name": "pin1",
+    "pin_number": 1,
+    "port_hints": ["pin1", "anode", "pos", "left", "1"],
+    "source_component_id": "source_component_2",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "source_port",
+    "source_port_id": "source_port_5",
+    "name": "pin2",
+    "pin_number": 2,
+    "port_hints": ["pin2", "cathode", "neg", "right", "2"],
+    "source_component_id": "source_component_2",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "source_component",
+    "source_component_id": "source_component_2",
+    "ftype": "simple_resistor",
+    "name": "U3",
+    "supplier_part_numbers": {
+      "jlcpcb": ["C25077", "C2906862", "C25139"]
+    },
+    "resistance": 10,
+    "display_resistance": "10Ω",
+    "are_pins_interchangeable": true,
+    "source_group_id": "source_group_0"
+  },
+  {
+    "type": "source_board",
+    "source_board_id": "source_board_0",
+    "source_group_id": "source_group_0"
+  },
+  {
+    "type": "source_pin_missing_trace_warning",
+    "source_pin_missing_trace_warning_id": "source_pin_missing_trace_warning_0",
+    "message": "Port pin1 on U1 is missing a trace",
+    "source_component_id": "source_component_0",
+    "source_port_id": "source_port_0",
+    "subcircuit_id": "subcircuit_source_group_0",
+    "warning_type": "source_pin_missing_trace_warning"
+  },
+  {
+    "type": "source_pin_missing_trace_warning",
+    "source_pin_missing_trace_warning_id": "source_pin_missing_trace_warning_1",
+    "message": "Port pin2 on U1 is missing a trace",
+    "source_component_id": "source_component_0",
+    "source_port_id": "source_port_1",
+    "subcircuit_id": "subcircuit_source_group_0",
+    "warning_type": "source_pin_missing_trace_warning"
+  },
+  {
+    "type": "source_pin_missing_trace_warning",
+    "source_pin_missing_trace_warning_id": "source_pin_missing_trace_warning_2",
+    "message": "Port pin1 on U2 is missing a trace",
+    "source_component_id": "source_component_1",
+    "source_port_id": "source_port_2",
+    "subcircuit_id": "subcircuit_source_group_0",
+    "warning_type": "source_pin_missing_trace_warning"
+  },
+  {
+    "type": "source_pin_missing_trace_warning",
+    "source_pin_missing_trace_warning_id": "source_pin_missing_trace_warning_3",
+    "message": "Port pin2 on U2 is missing a trace",
+    "source_component_id": "source_component_1",
+    "source_port_id": "source_port_3",
+    "subcircuit_id": "subcircuit_source_group_0",
+    "warning_type": "source_pin_missing_trace_warning"
+  },
+  {
+    "type": "source_pin_missing_trace_warning",
+    "source_pin_missing_trace_warning_id": "source_pin_missing_trace_warning_4",
+    "message": "Port pin1 on U3 is missing a trace",
+    "source_component_id": "source_component_2",
+    "source_port_id": "source_port_4",
+    "subcircuit_id": "subcircuit_source_group_0",
+    "warning_type": "source_pin_missing_trace_warning"
+  },
+  {
+    "type": "source_pin_missing_trace_warning",
+    "source_pin_missing_trace_warning_id": "source_pin_missing_trace_warning_5",
+    "message": "Port pin2 on U3 is missing a trace",
+    "source_component_id": "source_component_2",
+    "source_port_id": "source_port_5",
+    "subcircuit_id": "subcircuit_source_group_0",
+    "warning_type": "source_pin_missing_trace_warning"
+  },
+  {
+    "type": "schematic_component",
+    "schematic_component_id": "schematic_component_0",
+    "center": {
+      "x": 0,
+      "y": 0
+    },
+    "size": {
+      "width": 1.1,
+      "height": 0.388910699999999
+    },
+    "source_component_id": "source_component_0",
+    "is_box_with_pins": true,
+    "symbol_name": "boxresistor_right",
+    "symbol_display_value": "20Ω",
+    "schematic_group_id": "schematic_group_0"
+  },
+  {
+    "type": "schematic_component",
+    "schematic_component_id": "schematic_component_1",
+    "center": {
+      "x": 0,
+      "y": -1.588910699999999
+    },
+    "size": {
+      "width": 1.1,
+      "height": 0.388910699999999
+    },
+    "source_component_id": "source_component_1",
+    "is_box_with_pins": true,
+    "symbol_name": "boxresistor_right",
+    "symbol_display_value": "10Ω",
+    "schematic_group_id": "schematic_group_0"
+  },
+  {
+    "type": "schematic_component",
+    "schematic_component_id": "schematic_component_2",
+    "center": {
+      "x": 0,
+      "y": -3.177821399999998
+    },
+    "size": {
+      "width": 1.1,
+      "height": 0.388910699999999
+    },
+    "source_component_id": "source_component_2",
+    "is_box_with_pins": true,
+    "symbol_name": "boxresistor_right",
+    "symbol_display_value": "10Ω",
+    "schematic_group_id": "schematic_group_0"
+  },
+  {
+    "type": "schematic_group",
+    "schematic_group_id": "schematic_group_0",
+    "is_subcircuit": true,
+    "subcircuit_id": "subcircuit_source_group_0",
+    "name": "unnamed_board1",
+    "center": {
+      "x": 0,
+      "y": 0
+    },
+    "width": 0,
+    "height": 0,
+    "schematic_component_ids": [],
+    "source_group_id": "source_group_0"
+  },
+  {
+    "type": "schematic_port",
+    "schematic_port_id": "schematic_port_0",
+    "schematic_component_id": "schematic_component_0",
+    "center": {
+      "x": -0.55,
+      "y": 0
+    },
+    "source_port_id": "source_port_0",
+    "facing_direction": "left",
+    "distance_from_component_edge": 0.4,
+    "pin_number": 1,
+    "display_pin_label": "anode",
+    "is_connected": false
+  },
+  {
+    "type": "schematic_port",
+    "schematic_port_id": "schematic_port_1",
+    "schematic_component_id": "schematic_component_0",
+    "center": {
+      "x": 0.55,
+      "y": 0
+    },
+    "source_port_id": "source_port_1",
+    "facing_direction": "right",
+    "distance_from_component_edge": 0.4,
+    "pin_number": 2,
+    "display_pin_label": "cathode",
+    "is_connected": false
+  },
+  {
+    "type": "schematic_port",
+    "schematic_port_id": "schematic_port_2",
+    "schematic_component_id": "schematic_component_1",
+    "center": {
+      "x": -0.55,
+      "y": -1.588910699999999
+    },
+    "source_port_id": "source_port_2",
+    "facing_direction": "left",
+    "distance_from_component_edge": 0.4,
+    "pin_number": 1,
+    "display_pin_label": "anode",
+    "is_connected": false
+  },
+  {
+    "type": "schematic_port",
+    "schematic_port_id": "schematic_port_3",
+    "schematic_component_id": "schematic_component_1",
+    "center": {
+      "x": 0.55,
+      "y": -1.588910699999999
+    },
+    "source_port_id": "source_port_3",
+    "facing_direction": "right",
+    "distance_from_component_edge": 0.4,
+    "pin_number": 2,
+    "display_pin_label": "cathode",
+    "is_connected": false
+  },
+  {
+    "type": "schematic_port",
+    "schematic_port_id": "schematic_port_4",
+    "schematic_component_id": "schematic_component_2",
+    "center": {
+      "x": -0.55,
+      "y": -3.177821399999998
+    },
+    "source_port_id": "source_port_4",
+    "facing_direction": "left",
+    "distance_from_component_edge": 0.4,
+    "pin_number": 1,
+    "display_pin_label": "anode",
+    "is_connected": false
+  },
+  {
+    "type": "schematic_port",
+    "schematic_port_id": "schematic_port_5",
+    "schematic_component_id": "schematic_component_2",
+    "center": {
+      "x": 0.55,
+      "y": -3.177821399999998
+    },
+    "source_port_id": "source_port_5",
+    "facing_direction": "right",
+    "distance_from_component_edge": 0.4,
+    "pin_number": 2,
+    "display_pin_label": "cathode",
+    "is_connected": false
+  },
+  {
+    "type": "pcb_component",
+    "pcb_component_id": "pcb_component_0",
+    "center": {
+      "x": -3,
+      "y": 0
+    },
+    "width": 0.54,
+    "height": 1.6600000000000001,
+    "layer": "bottom",
+    "rotation": 90,
+    "source_component_id": "source_component_0",
+    "subcircuit_id": "subcircuit_source_group_0",
+    "do_not_place": false,
+    "obstructs_within_bounds": true
+  },
+  {
+    "type": "pcb_component",
+    "pcb_component_id": "pcb_component_1",
+    "center": {
+      "x": 3,
+      "y": 0
+    },
+    "width": 1.5599999999999996,
+    "height": 0.6400000000000001,
+    "layer": "bottom",
+    "rotation": 180,
+    "source_component_id": "source_component_1",
+    "subcircuit_id": "subcircuit_source_group_0",
+    "do_not_place": false,
+    "obstructs_within_bounds": true
+  },
+  {
+    "type": "pcb_component",
+    "pcb_component_id": "pcb_component_2",
+    "center": {
+      "x": 0,
+      "y": 0
+    },
+    "width": 0.5400000000000003,
+    "height": 1.6600000000000001,
+    "layer": "bottom",
+    "rotation": 270,
+    "source_component_id": "source_component_2",
+    "subcircuit_id": "subcircuit_source_group_0",
+    "do_not_place": false,
+    "obstructs_within_bounds": true
+  },
+  {
+    "type": "pcb_board",
+    "pcb_board_id": "pcb_board_0",
+    "center": {
+      "x": 0,
+      "y": 0
+    },
+    "thickness": 1.4,
+    "num_layers": 2,
+    "width": 10,
+    "height": 10,
+    "material": "fr4"
+  },
+  {
+    "type": "pcb_smtpad",
+    "pcb_smtpad_id": "pcb_smtpad_0",
+    "pcb_component_id": "pcb_component_0",
+    "pcb_port_id": "pcb_port_0",
+    "layer": "bottom",
+    "shape": "rect",
+    "width": 0.64,
+    "height": 0.54,
+    "port_hints": ["1", "left"],
+    "is_covered_with_solder_mask": false,
+    "x": -3,
+    "y": 0.51,
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_solder_paste",
+    "pcb_solder_paste_id": "pcb_solder_paste_0",
+    "layer": "bottom",
+    "shape": "rect",
+    "width": 0.44799999999999995,
+    "height": 0.378,
+    "x": -3,
+    "y": 0.51,
+    "pcb_component_id": "pcb_component_0",
+    "pcb_smtpad_id": "pcb_smtpad_0",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_smtpad",
+    "pcb_smtpad_id": "pcb_smtpad_1",
+    "pcb_component_id": "pcb_component_0",
+    "pcb_port_id": "pcb_port_1",
+    "layer": "bottom",
+    "shape": "rect",
+    "width": 0.64,
+    "height": 0.54,
+    "port_hints": ["2", "right"],
+    "is_covered_with_solder_mask": false,
+    "x": -3,
+    "y": -0.51,
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_solder_paste",
+    "pcb_solder_paste_id": "pcb_solder_paste_1",
+    "layer": "bottom",
+    "shape": "rect",
+    "width": 0.44799999999999995,
+    "height": 0.378,
+    "x": -3,
+    "y": -0.51,
+    "pcb_component_id": "pcb_component_0",
+    "pcb_smtpad_id": "pcb_smtpad_1",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_silkscreen_path",
+    "pcb_silkscreen_path_id": "pcb_silkscreen_path_0",
+    "pcb_component_id": "pcb_component_0",
+    "layer": "bottom",
+    "route": [
+      {
+        "x": -3.7199999999999998,
+        "y": -0.51
+      },
+      {
+        "x": -3.7199999999999998,
+        "y": 0.98
+      },
+      {
+        "x": -2.28,
+        "y": 0.98
+      },
+      {
+        "x": -2.2800000000000002,
+        "y": -0.51
+      }
+    ],
+    "stroke_width": 0.1,
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_silkscreen_text",
+    "pcb_silkscreen_text_id": "pcb_silkscreen_text_0",
+    "anchor_alignment": "center",
+    "anchor_position": {
+      "x": -4.22,
+      "y": 7.470345474798854e-17
+    },
+    "font": "tscircuit2024",
+    "font_size": 0.4,
+    "layer": "bottom",
+    "text": "U1",
+    "ccw_rotation": 270,
+    "pcb_component_id": "pcb_component_0",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_smtpad",
+    "pcb_smtpad_id": "pcb_smtpad_2",
+    "pcb_component_id": "pcb_component_1",
+    "pcb_port_id": "pcb_port_2",
+    "layer": "bottom",
+    "shape": "rect",
+    "width": 0.54,
+    "height": 0.64,
+    "port_hints": ["1", "left"],
+    "is_covered_with_solder_mask": false,
+    "x": 2.49,
+    "y": 6.245698675651501e-17,
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_solder_paste",
+    "pcb_solder_paste_id": "pcb_solder_paste_2",
+    "layer": "bottom",
+    "shape": "rect",
+    "width": 0.378,
+    "height": 0.44799999999999995,
+    "x": 2.49,
+    "y": 6.245698675651501e-17,
+    "pcb_component_id": "pcb_component_1",
+    "pcb_smtpad_id": "pcb_smtpad_2",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_smtpad",
+    "pcb_smtpad_id": "pcb_smtpad_3",
+    "pcb_component_id": "pcb_component_1",
+    "pcb_port_id": "pcb_port_3",
+    "layer": "bottom",
+    "shape": "rect",
+    "width": 0.54,
+    "height": 0.64,
+    "port_hints": ["2", "right"],
+    "is_covered_with_solder_mask": false,
+    "x": 3.51,
+    "y": -6.245698675651501e-17,
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_solder_paste",
+    "pcb_solder_paste_id": "pcb_solder_paste_3",
+    "layer": "bottom",
+    "shape": "rect",
+    "width": 0.378,
+    "height": 0.44799999999999995,
+    "x": 3.51,
+    "y": -6.245698675651501e-17,
+    "pcb_component_id": "pcb_component_1",
+    "pcb_smtpad_id": "pcb_smtpad_3",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_silkscreen_path",
+    "pcb_silkscreen_path_id": "pcb_silkscreen_path_1",
+    "pcb_component_id": "pcb_component_1",
+    "layer": "bottom",
+    "route": [
+      {
+        "x": 3.51,
+        "y": -0.7200000000000001
+      },
+      {
+        "x": 2.02,
+        "y": -0.7199999999999999
+      },
+      {
+        "x": 2.02,
+        "y": 0.7200000000000001
+      },
+      {
+        "x": 3.5100000000000002,
+        "y": 0.7199999999999999
+      }
+    ],
+    "stroke_width": 0.1,
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_silkscreen_text",
+    "pcb_silkscreen_text_id": "pcb_silkscreen_text_1",
+    "anchor_alignment": "center",
+    "anchor_position": {
+      "x": 3,
+      "y": -1.22
+    },
+    "font": "tscircuit2024",
+    "font_size": 0.4,
+    "layer": "bottom",
+    "text": "U2",
+    "ccw_rotation": 0,
+    "pcb_component_id": "pcb_component_1",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_smtpad",
+    "pcb_smtpad_id": "pcb_smtpad_4",
+    "pcb_component_id": "pcb_component_2",
+    "pcb_port_id": "pcb_port_4",
+    "layer": "bottom",
+    "shape": "rect",
+    "width": 0.64,
+    "height": 0.54,
+    "port_hints": ["1", "left"],
+    "is_covered_with_solder_mask": false,
+    "x": -9.368548013477251e-17,
+    "y": -0.51,
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_solder_paste",
+    "pcb_solder_paste_id": "pcb_solder_paste_4",
+    "layer": "bottom",
+    "shape": "rect",
+    "width": 0.44799999999999995,
+    "height": 0.378,
+    "x": -9.368548013477251e-17,
+    "y": -0.51,
+    "pcb_component_id": "pcb_component_2",
+    "pcb_smtpad_id": "pcb_smtpad_4",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_smtpad",
+    "pcb_smtpad_id": "pcb_smtpad_5",
+    "pcb_component_id": "pcb_component_2",
+    "pcb_port_id": "pcb_port_5",
+    "layer": "bottom",
+    "shape": "rect",
+    "width": 0.64,
+    "height": 0.54,
+    "port_hints": ["2", "right"],
+    "is_covered_with_solder_mask": false,
+    "x": 9.368548013477251e-17,
+    "y": 0.51,
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_solder_paste",
+    "pcb_solder_paste_id": "pcb_solder_paste_5",
+    "layer": "bottom",
+    "shape": "rect",
+    "width": 0.44799999999999995,
+    "height": 0.378,
+    "x": 9.368548013477251e-17,
+    "y": 0.51,
+    "pcb_component_id": "pcb_component_2",
+    "pcb_smtpad_id": "pcb_smtpad_5",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_silkscreen_path",
+    "pcb_silkscreen_path_id": "pcb_silkscreen_path_2",
+    "pcb_component_id": "pcb_component_2",
+    "layer": "bottom",
+    "route": [
+      {
+        "x": 0.7200000000000001,
+        "y": 0.5099999999999999
+      },
+      {
+        "x": 0.7199999999999998,
+        "y": -0.9800000000000001
+      },
+      {
+        "x": -0.7200000000000002,
+        "y": -0.9799999999999999
+      },
+      {
+        "x": -0.7199999999999999,
+        "y": 0.5100000000000001
+      }
+    ],
+    "stroke_width": 0.1,
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_silkscreen_text",
+    "pcb_silkscreen_text_id": "pcb_silkscreen_text_2",
+    "anchor_alignment": "center",
+    "anchor_position": {
+      "x": 1.22,
+      "y": -2.241103642439656e-16
+    },
+    "font": "tscircuit2024",
+    "font_size": 0.4,
+    "layer": "bottom",
+    "text": "U3",
+    "ccw_rotation": 90,
+    "pcb_component_id": "pcb_component_2",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_port",
+    "pcb_port_id": "pcb_port_0",
+    "pcb_component_id": "pcb_component_0",
+    "layers": ["bottom"],
+    "subcircuit_id": "subcircuit_source_group_0",
+    "x": -3,
+    "y": 0.51,
+    "source_port_id": "source_port_0"
+  },
+  {
+    "type": "pcb_port",
+    "pcb_port_id": "pcb_port_1",
+    "pcb_component_id": "pcb_component_0",
+    "layers": ["bottom"],
+    "subcircuit_id": "subcircuit_source_group_0",
+    "x": -3,
+    "y": -0.51,
+    "source_port_id": "source_port_1"
+  },
+  {
+    "type": "pcb_port",
+    "pcb_port_id": "pcb_port_2",
+    "pcb_component_id": "pcb_component_1",
+    "layers": ["bottom"],
+    "subcircuit_id": "subcircuit_source_group_0",
+    "x": 2.49,
+    "y": 6.245698675651501e-17,
+    "source_port_id": "source_port_2"
+  },
+  {
+    "type": "pcb_port",
+    "pcb_port_id": "pcb_port_3",
+    "pcb_component_id": "pcb_component_1",
+    "layers": ["bottom"],
+    "subcircuit_id": "subcircuit_source_group_0",
+    "x": 3.51,
+    "y": -6.245698675651501e-17,
+    "source_port_id": "source_port_3"
+  },
+  {
+    "type": "pcb_port",
+    "pcb_port_id": "pcb_port_4",
+    "pcb_component_id": "pcb_component_2",
+    "layers": ["bottom"],
+    "subcircuit_id": "subcircuit_source_group_0",
+    "x": -9.368548013477251e-17,
+    "y": -0.51,
+    "source_port_id": "source_port_4"
+  },
+  {
+    "type": "pcb_port",
+    "pcb_port_id": "pcb_port_5",
+    "pcb_component_id": "pcb_component_2",
+    "layers": ["bottom"],
+    "subcircuit_id": "subcircuit_source_group_0",
+    "x": 9.368548013477251e-17,
+    "y": 0.51,
+    "source_port_id": "source_port_5"
+  },
+  {
+    "type": "cad_component",
+    "cad_component_id": "cad_component_0",
+    "position": {
+      "x": -3,
+      "y": 0,
+      "z": -0.7
+    },
+    "rotation": {
+      "x": 0,
+      "y": 180,
+      "z": 0
+    },
+    "pcb_component_id": "pcb_component_0",
+    "source_component_id": "source_component_0",
+    "footprinter_string": "0402"
+  },
+  {
+    "type": "cad_component",
+    "cad_component_id": "cad_component_1",
+    "position": {
+      "x": 3,
+      "y": 0,
+      "z": -0.7
+    },
+    "rotation": {
+      "x": 0,
+      "y": 180,
+      "z": 180
+    },
+    "pcb_component_id": "pcb_component_1",
+    "source_component_id": "source_component_1",
+    "footprinter_string": "0402"
+  },
+  {
+    "type": "cad_component",
+    "cad_component_id": "cad_component_2",
+    "position": {
+      "x": 0,
+      "y": 0,
+      "z": -0.7
+    },
+    "rotation": {
+      "x": 0,
+      "y": 180,
+      "z": 0
+    },
+    "pcb_component_id": "pcb_component_2",
+    "source_component_id": "source_component_2",
+    "footprinter_string": "0402"
+  }
+]
diff --git a/tests/fixtures/smtpad-top-layer.json b/tests/fixtures/smtpad-top-layer.json
new file mode 100644
index 0000000..020e4a5
--- /dev/null
+++ b/tests/fixtures/smtpad-top-layer.json
@@ -0,0 +1,788 @@
+[
+  {
+    "type": "source_project_metadata",
+    "source_project_metadata_id": "source_project_metadata_0",
+    "software_used_string": "@tscircuit/core@0.0.801"
+  },
+  {
+    "type": "source_group",
+    "source_group_id": "source_group_0",
+    "is_subcircuit": true,
+    "was_automatically_named": true,
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "source_port",
+    "source_port_id": "source_port_0",
+    "name": "pin1",
+    "pin_number": 1,
+    "port_hints": ["pin1", "anode", "pos", "left", "1"],
+    "source_component_id": "source_component_0",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "source_port",
+    "source_port_id": "source_port_1",
+    "name": "pin2",
+    "pin_number": 2,
+    "port_hints": ["pin2", "cathode", "neg", "right", "2"],
+    "source_component_id": "source_component_0",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "source_component",
+    "source_component_id": "source_component_0",
+    "ftype": "simple_resistor",
+    "name": "U1",
+    "supplier_part_numbers": {
+      "jlcpcb": ["C25089", "C138031", "C162907"]
+    },
+    "resistance": 20,
+    "display_resistance": "20Ω",
+    "are_pins_interchangeable": true,
+    "source_group_id": "source_group_0"
+  },
+  {
+    "type": "source_port",
+    "source_port_id": "source_port_2",
+    "name": "pin1",
+    "pin_number": 1,
+    "port_hints": ["pin1", "anode", "pos", "left", "1"],
+    "source_component_id": "source_component_1",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "source_port",
+    "source_port_id": "source_port_3",
+    "name": "pin2",
+    "pin_number": 2,
+    "port_hints": ["pin2", "cathode", "neg", "right", "2"],
+    "source_component_id": "source_component_1",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "source_component",
+    "source_component_id": "source_component_1",
+    "ftype": "simple_resistor",
+    "name": "U2",
+    "supplier_part_numbers": {
+      "jlcpcb": ["C25077", "C2906862", "C25139"]
+    },
+    "resistance": 10,
+    "display_resistance": "10Ω",
+    "are_pins_interchangeable": true,
+    "source_group_id": "source_group_0"
+  },
+  {
+    "type": "source_port",
+    "source_port_id": "source_port_4",
+    "name": "pin1",
+    "pin_number": 1,
+    "port_hints": ["pin1", "anode", "pos", "left", "1"],
+    "source_component_id": "source_component_2",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "source_port",
+    "source_port_id": "source_port_5",
+    "name": "pin2",
+    "pin_number": 2,
+    "port_hints": ["pin2", "cathode", "neg", "right", "2"],
+    "source_component_id": "source_component_2",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "source_component",
+    "source_component_id": "source_component_2",
+    "ftype": "simple_resistor",
+    "name": "U3",
+    "supplier_part_numbers": {
+      "jlcpcb": ["C25077", "C2906862", "C25139"]
+    },
+    "resistance": 10,
+    "display_resistance": "10Ω",
+    "are_pins_interchangeable": true,
+    "source_group_id": "source_group_0"
+  },
+  {
+    "type": "source_board",
+    "source_board_id": "source_board_0",
+    "source_group_id": "source_group_0"
+  },
+  {
+    "type": "source_pin_missing_trace_warning",
+    "source_pin_missing_trace_warning_id": "source_pin_missing_trace_warning_0",
+    "message": "Port pin1 on U1 is missing a trace",
+    "source_component_id": "source_component_0",
+    "source_port_id": "source_port_0",
+    "subcircuit_id": "subcircuit_source_group_0",
+    "warning_type": "source_pin_missing_trace_warning"
+  },
+  {
+    "type": "source_pin_missing_trace_warning",
+    "source_pin_missing_trace_warning_id": "source_pin_missing_trace_warning_1",
+    "message": "Port pin2 on U1 is missing a trace",
+    "source_component_id": "source_component_0",
+    "source_port_id": "source_port_1",
+    "subcircuit_id": "subcircuit_source_group_0",
+    "warning_type": "source_pin_missing_trace_warning"
+  },
+  {
+    "type": "source_pin_missing_trace_warning",
+    "source_pin_missing_trace_warning_id": "source_pin_missing_trace_warning_2",
+    "message": "Port pin1 on U2 is missing a trace",
+    "source_component_id": "source_component_1",
+    "source_port_id": "source_port_2",
+    "subcircuit_id": "subcircuit_source_group_0",
+    "warning_type": "source_pin_missing_trace_warning"
+  },
+  {
+    "type": "source_pin_missing_trace_warning",
+    "source_pin_missing_trace_warning_id": "source_pin_missing_trace_warning_3",
+    "message": "Port pin2 on U2 is missing a trace",
+    "source_component_id": "source_component_1",
+    "source_port_id": "source_port_3",
+    "subcircuit_id": "subcircuit_source_group_0",
+    "warning_type": "source_pin_missing_trace_warning"
+  },
+  {
+    "type": "source_pin_missing_trace_warning",
+    "source_pin_missing_trace_warning_id": "source_pin_missing_trace_warning_4",
+    "message": "Port pin1 on U3 is missing a trace",
+    "source_component_id": "source_component_2",
+    "source_port_id": "source_port_4",
+    "subcircuit_id": "subcircuit_source_group_0",
+    "warning_type": "source_pin_missing_trace_warning"
+  },
+  {
+    "type": "source_pin_missing_trace_warning",
+    "source_pin_missing_trace_warning_id": "source_pin_missing_trace_warning_5",
+    "message": "Port pin2 on U3 is missing a trace",
+    "source_component_id": "source_component_2",
+    "source_port_id": "source_port_5",
+    "subcircuit_id": "subcircuit_source_group_0",
+    "warning_type": "source_pin_missing_trace_warning"
+  },
+  {
+    "type": "schematic_component",
+    "schematic_component_id": "schematic_component_0",
+    "center": {
+      "x": 0,
+      "y": 0
+    },
+    "size": {
+      "width": 1.1,
+      "height": 0.388910699999999
+    },
+    "source_component_id": "source_component_0",
+    "is_box_with_pins": true,
+    "symbol_name": "boxresistor_right",
+    "symbol_display_value": "20Ω",
+    "schematic_group_id": "schematic_group_0"
+  },
+  {
+    "type": "schematic_component",
+    "schematic_component_id": "schematic_component_1",
+    "center": {
+      "x": 0,
+      "y": -1.588910699999999
+    },
+    "size": {
+      "width": 1.1,
+      "height": 0.388910699999999
+    },
+    "source_component_id": "source_component_1",
+    "is_box_with_pins": true,
+    "symbol_name": "boxresistor_right",
+    "symbol_display_value": "10Ω",
+    "schematic_group_id": "schematic_group_0"
+  },
+  {
+    "type": "schematic_component",
+    "schematic_component_id": "schematic_component_2",
+    "center": {
+      "x": 0,
+      "y": -3.177821399999998
+    },
+    "size": {
+      "width": 1.1,
+      "height": 0.388910699999999
+    },
+    "source_component_id": "source_component_2",
+    "is_box_with_pins": true,
+    "symbol_name": "boxresistor_right",
+    "symbol_display_value": "10Ω",
+    "schematic_group_id": "schematic_group_0"
+  },
+  {
+    "type": "schematic_group",
+    "schematic_group_id": "schematic_group_0",
+    "is_subcircuit": true,
+    "subcircuit_id": "subcircuit_source_group_0",
+    "name": "unnamed_board1",
+    "center": {
+      "x": 0,
+      "y": 0
+    },
+    "width": 0,
+    "height": 0,
+    "schematic_component_ids": [],
+    "source_group_id": "source_group_0"
+  },
+  {
+    "type": "schematic_port",
+    "schematic_port_id": "schematic_port_0",
+    "schematic_component_id": "schematic_component_0",
+    "center": {
+      "x": -0.55,
+      "y": 0
+    },
+    "source_port_id": "source_port_0",
+    "facing_direction": "left",
+    "distance_from_component_edge": 0.4,
+    "pin_number": 1,
+    "display_pin_label": "anode",
+    "is_connected": false
+  },
+  {
+    "type": "schematic_port",
+    "schematic_port_id": "schematic_port_1",
+    "schematic_component_id": "schematic_component_0",
+    "center": {
+      "x": 0.55,
+      "y": 0
+    },
+    "source_port_id": "source_port_1",
+    "facing_direction": "right",
+    "distance_from_component_edge": 0.4,
+    "pin_number": 2,
+    "display_pin_label": "cathode",
+    "is_connected": false
+  },
+  {
+    "type": "schematic_port",
+    "schematic_port_id": "schematic_port_2",
+    "schematic_component_id": "schematic_component_1",
+    "center": {
+      "x": -0.55,
+      "y": -1.588910699999999
+    },
+    "source_port_id": "source_port_2",
+    "facing_direction": "left",
+    "distance_from_component_edge": 0.4,
+    "pin_number": 1,
+    "display_pin_label": "anode",
+    "is_connected": false
+  },
+  {
+    "type": "schematic_port",
+    "schematic_port_id": "schematic_port_3",
+    "schematic_component_id": "schematic_component_1",
+    "center": {
+      "x": 0.55,
+      "y": -1.588910699999999
+    },
+    "source_port_id": "source_port_3",
+    "facing_direction": "right",
+    "distance_from_component_edge": 0.4,
+    "pin_number": 2,
+    "display_pin_label": "cathode",
+    "is_connected": false
+  },
+  {
+    "type": "schematic_port",
+    "schematic_port_id": "schematic_port_4",
+    "schematic_component_id": "schematic_component_2",
+    "center": {
+      "x": -0.55,
+      "y": -3.177821399999998
+    },
+    "source_port_id": "source_port_4",
+    "facing_direction": "left",
+    "distance_from_component_edge": 0.4,
+    "pin_number": 1,
+    "display_pin_label": "anode",
+    "is_connected": false
+  },
+  {
+    "type": "schematic_port",
+    "schematic_port_id": "schematic_port_5",
+    "schematic_component_id": "schematic_component_2",
+    "center": {
+      "x": 0.55,
+      "y": -3.177821399999998
+    },
+    "source_port_id": "source_port_5",
+    "facing_direction": "right",
+    "distance_from_component_edge": 0.4,
+    "pin_number": 2,
+    "display_pin_label": "cathode",
+    "is_connected": false
+  },
+  {
+    "type": "pcb_component",
+    "pcb_component_id": "pcb_component_0",
+    "center": {
+      "x": -3,
+      "y": 0
+    },
+    "width": 0.54,
+    "height": 1.6600000000000001,
+    "layer": "top",
+    "rotation": 90,
+    "source_component_id": "source_component_0",
+    "subcircuit_id": "subcircuit_source_group_0",
+    "do_not_place": false,
+    "obstructs_within_bounds": true
+  },
+  {
+    "type": "pcb_component",
+    "pcb_component_id": "pcb_component_1",
+    "center": {
+      "x": 3,
+      "y": 0
+    },
+    "width": 1.5599999999999996,
+    "height": 0.6400000000000001,
+    "layer": "top",
+    "rotation": 180,
+    "source_component_id": "source_component_1",
+    "subcircuit_id": "subcircuit_source_group_0",
+    "do_not_place": false,
+    "obstructs_within_bounds": true
+  },
+  {
+    "type": "pcb_component",
+    "pcb_component_id": "pcb_component_2",
+    "center": {
+      "x": 0,
+      "y": 0
+    },
+    "width": 0.5400000000000003,
+    "height": 1.6600000000000001,
+    "layer": "top",
+    "rotation": 270,
+    "source_component_id": "source_component_2",
+    "subcircuit_id": "subcircuit_source_group_0",
+    "do_not_place": false,
+    "obstructs_within_bounds": true
+  },
+  {
+    "type": "pcb_board",
+    "pcb_board_id": "pcb_board_0",
+    "center": {
+      "x": 0,
+      "y": 0
+    },
+    "thickness": 1.4,
+    "num_layers": 2,
+    "width": 10,
+    "height": 10,
+    "material": "fr4"
+  },
+  {
+    "type": "pcb_smtpad",
+    "pcb_smtpad_id": "pcb_smtpad_0",
+    "pcb_component_id": "pcb_component_0",
+    "pcb_port_id": "pcb_port_0",
+    "layer": "top",
+    "shape": "rect",
+    "width": 0.64,
+    "height": 0.54,
+    "port_hints": ["1", "left"],
+    "is_covered_with_solder_mask": false,
+    "x": -3,
+    "y": -0.51,
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_solder_paste",
+    "pcb_solder_paste_id": "pcb_solder_paste_0",
+    "layer": "top",
+    "shape": "rect",
+    "width": 0.44799999999999995,
+    "height": 0.378,
+    "x": -3,
+    "y": -0.51,
+    "pcb_component_id": "pcb_component_0",
+    "pcb_smtpad_id": "pcb_smtpad_0",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_smtpad",
+    "pcb_smtpad_id": "pcb_smtpad_1",
+    "pcb_component_id": "pcb_component_0",
+    "pcb_port_id": "pcb_port_1",
+    "layer": "top",
+    "shape": "rect",
+    "width": 0.64,
+    "height": 0.54,
+    "port_hints": ["2", "right"],
+    "is_covered_with_solder_mask": false,
+    "x": -3,
+    "y": 0.51,
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_solder_paste",
+    "pcb_solder_paste_id": "pcb_solder_paste_1",
+    "layer": "top",
+    "shape": "rect",
+    "width": 0.44799999999999995,
+    "height": 0.378,
+    "x": -3,
+    "y": 0.51,
+    "pcb_component_id": "pcb_component_0",
+    "pcb_smtpad_id": "pcb_smtpad_1",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_silkscreen_path",
+    "pcb_silkscreen_path_id": "pcb_silkscreen_path_0",
+    "pcb_component_id": "pcb_component_0",
+    "layer": "top",
+    "route": [
+      {
+        "x": -3.7199999999999998,
+        "y": 0.51
+      },
+      {
+        "x": -3.72,
+        "y": -0.98
+      },
+      {
+        "x": -2.2800000000000002,
+        "y": -0.98
+      },
+      {
+        "x": -2.2800000000000002,
+        "y": 0.51
+      }
+    ],
+    "stroke_width": 0.1,
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_silkscreen_text",
+    "pcb_silkscreen_text_id": "pcb_silkscreen_text_0",
+    "anchor_alignment": "center",
+    "anchor_position": {
+      "x": -4.22,
+      "y": 7.470345474798854e-17
+    },
+    "font": "tscircuit2024",
+    "font_size": 0.4,
+    "layer": "top",
+    "text": "U1",
+    "ccw_rotation": 90,
+    "pcb_component_id": "pcb_component_0",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_smtpad",
+    "pcb_smtpad_id": "pcb_smtpad_2",
+    "pcb_component_id": "pcb_component_1",
+    "pcb_port_id": "pcb_port_2",
+    "layer": "top",
+    "shape": "rect",
+    "width": 0.54,
+    "height": 0.64,
+    "port_hints": ["1", "left"],
+    "is_covered_with_solder_mask": false,
+    "x": 3.51,
+    "y": -6.245698675651501e-17,
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_solder_paste",
+    "pcb_solder_paste_id": "pcb_solder_paste_2",
+    "layer": "top",
+    "shape": "rect",
+    "width": 0.378,
+    "height": 0.44799999999999995,
+    "x": 3.51,
+    "y": -6.245698675651501e-17,
+    "pcb_component_id": "pcb_component_1",
+    "pcb_smtpad_id": "pcb_smtpad_2",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_smtpad",
+    "pcb_smtpad_id": "pcb_smtpad_3",
+    "pcb_component_id": "pcb_component_1",
+    "pcb_port_id": "pcb_port_3",
+    "layer": "top",
+    "shape": "rect",
+    "width": 0.54,
+    "height": 0.64,
+    "port_hints": ["2", "right"],
+    "is_covered_with_solder_mask": false,
+    "x": 2.49,
+    "y": 6.245698675651501e-17,
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_solder_paste",
+    "pcb_solder_paste_id": "pcb_solder_paste_3",
+    "layer": "top",
+    "shape": "rect",
+    "width": 0.378,
+    "height": 0.44799999999999995,
+    "x": 2.49,
+    "y": 6.245698675651501e-17,
+    "pcb_component_id": "pcb_component_1",
+    "pcb_smtpad_id": "pcb_smtpad_3",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_silkscreen_path",
+    "pcb_silkscreen_path_id": "pcb_silkscreen_path_1",
+    "pcb_component_id": "pcb_component_1",
+    "layer": "top",
+    "route": [
+      {
+        "x": 2.4899999999999998,
+        "y": -0.7199999999999999
+      },
+      {
+        "x": 3.98,
+        "y": -0.7200000000000001
+      },
+      {
+        "x": 3.98,
+        "y": 0.7199999999999999
+      },
+      {
+        "x": 2.49,
+        "y": 0.7200000000000001
+      }
+    ],
+    "stroke_width": 0.1,
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_silkscreen_text",
+    "pcb_silkscreen_text_id": "pcb_silkscreen_text_1",
+    "anchor_alignment": "center",
+    "anchor_position": {
+      "x": 3,
+      "y": -1.22
+    },
+    "font": "tscircuit2024",
+    "font_size": 0.4,
+    "layer": "top",
+    "text": "U2",
+    "ccw_rotation": 180,
+    "pcb_component_id": "pcb_component_1",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_smtpad",
+    "pcb_smtpad_id": "pcb_smtpad_4",
+    "pcb_component_id": "pcb_component_2",
+    "pcb_port_id": "pcb_port_4",
+    "layer": "top",
+    "shape": "rect",
+    "width": 0.64,
+    "height": 0.54,
+    "port_hints": ["1", "left"],
+    "is_covered_with_solder_mask": false,
+    "x": 9.368548013477251e-17,
+    "y": 0.51,
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_solder_paste",
+    "pcb_solder_paste_id": "pcb_solder_paste_4",
+    "layer": "top",
+    "shape": "rect",
+    "width": 0.44799999999999995,
+    "height": 0.378,
+    "x": 9.368548013477251e-17,
+    "y": 0.51,
+    "pcb_component_id": "pcb_component_2",
+    "pcb_smtpad_id": "pcb_smtpad_4",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_smtpad",
+    "pcb_smtpad_id": "pcb_smtpad_5",
+    "pcb_component_id": "pcb_component_2",
+    "pcb_port_id": "pcb_port_5",
+    "layer": "top",
+    "shape": "rect",
+    "width": 0.64,
+    "height": 0.54,
+    "port_hints": ["2", "right"],
+    "is_covered_with_solder_mask": false,
+    "x": -9.368548013477251e-17,
+    "y": -0.51,
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_solder_paste",
+    "pcb_solder_paste_id": "pcb_solder_paste_5",
+    "layer": "top",
+    "shape": "rect",
+    "width": 0.44799999999999995,
+    "height": 0.378,
+    "x": -9.368548013477251e-17,
+    "y": -0.51,
+    "pcb_component_id": "pcb_component_2",
+    "pcb_smtpad_id": "pcb_smtpad_5",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_silkscreen_path",
+    "pcb_silkscreen_path_id": "pcb_silkscreen_path_2",
+    "pcb_component_id": "pcb_component_2",
+    "layer": "top",
+    "route": [
+      {
+        "x": 0.7199999999999999,
+        "y": -0.5100000000000001
+      },
+      {
+        "x": 0.7200000000000002,
+        "y": 0.9799999999999999
+      },
+      {
+        "x": -0.7199999999999998,
+        "y": 0.9800000000000001
+      },
+      {
+        "x": -0.7200000000000001,
+        "y": -0.5099999999999999
+      }
+    ],
+    "stroke_width": 0.1,
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_silkscreen_text",
+    "pcb_silkscreen_text_id": "pcb_silkscreen_text_2",
+    "anchor_alignment": "center",
+    "anchor_position": {
+      "x": 1.22,
+      "y": -2.241103642439656e-16
+    },
+    "font": "tscircuit2024",
+    "font_size": 0.4,
+    "layer": "top",
+    "text": "U3",
+    "ccw_rotation": 270,
+    "pcb_component_id": "pcb_component_2",
+    "subcircuit_id": "subcircuit_source_group_0"
+  },
+  {
+    "type": "pcb_port",
+    "pcb_port_id": "pcb_port_0",
+    "pcb_component_id": "pcb_component_0",
+    "layers": ["top"],
+    "subcircuit_id": "subcircuit_source_group_0",
+    "x": -3,
+    "y": -0.51,
+    "source_port_id": "source_port_0"
+  },
+  {
+    "type": "pcb_port",
+    "pcb_port_id": "pcb_port_1",
+    "pcb_component_id": "pcb_component_0",
+    "layers": ["top"],
+    "subcircuit_id": "subcircuit_source_group_0",
+    "x": -3,
+    "y": 0.51,
+    "source_port_id": "source_port_1"
+  },
+  {
+    "type": "pcb_port",
+    "pcb_port_id": "pcb_port_2",
+    "pcb_component_id": "pcb_component_1",
+    "layers": ["top"],
+    "subcircuit_id": "subcircuit_source_group_0",
+    "x": 3.51,
+    "y": -6.245698675651501e-17,
+    "source_port_id": "source_port_2"
+  },
+  {
+    "type": "pcb_port",
+    "pcb_port_id": "pcb_port_3",
+    "pcb_component_id": "pcb_component_1",
+    "layers": ["top"],
+    "subcircuit_id": "subcircuit_source_group_0",
+    "x": 2.49,
+    "y": 6.245698675651501e-17,
+    "source_port_id": "source_port_3"
+  },
+  {
+    "type": "pcb_port",
+    "pcb_port_id": "pcb_port_4",
+    "pcb_component_id": "pcb_component_2",
+    "layers": ["top"],
+    "subcircuit_id": "subcircuit_source_group_0",
+    "x": 9.368548013477251e-17,
+    "y": 0.51,
+    "source_port_id": "source_port_4"
+  },
+  {
+    "type": "pcb_port",
+    "pcb_port_id": "pcb_port_5",
+    "pcb_component_id": "pcb_component_2",
+    "layers": ["top"],
+    "subcircuit_id": "subcircuit_source_group_0",
+    "x": -9.368548013477251e-17,
+    "y": -0.51,
+    "source_port_id": "source_port_5"
+  },
+  {
+    "type": "cad_component",
+    "cad_component_id": "cad_component_0",
+    "position": {
+      "x": -3,
+      "y": 0,
+      "z": 0.7
+    },
+    "rotation": {
+      "x": 0,
+      "y": 0,
+      "z": 180
+    },
+    "pcb_component_id": "pcb_component_0",
+    "source_component_id": "source_component_0",
+    "footprinter_string": "0402"
+  },
+  {
+    "type": "cad_component",
+    "cad_component_id": "cad_component_1",
+    "position": {
+      "x": 3,
+      "y": 0,
+      "z": 0.7
+    },
+    "rotation": {
+      "x": 0,
+      "y": 0,
+      "z": 0
+    },
+    "pcb_component_id": "pcb_component_1",
+    "source_component_id": "source_component_1",
+    "footprinter_string": "0402"
+  },
+  {
+    "type": "cad_component",
+    "cad_component_id": "cad_component_2",
+    "position": {
+      "x": 0,
+      "y": 0,
+      "z": 0.7
+    },
+    "rotation": {
+      "x": 0,
+      "y": 0,
+      "z": 180
+    },
+    "pcb_component_id": "pcb_component_2",
+    "source_component_id": "source_component_2",
+    "footprinter_string": "0402"
+  }
+]
diff --git a/tests/repro/__snapshots__/bottom-layer-components-bottom-view.snap.png b/tests/repro/__snapshots__/bottom-layer-components-bottom-view.snap.png
new file mode 100644
index 0000000..d0a0570
Binary files /dev/null and b/tests/repro/__snapshots__/bottom-layer-components-bottom-view.snap.png differ
diff --git a/tests/repro/__snapshots__/top-layer-components-top-view.snap.png b/tests/repro/__snapshots__/top-layer-components-top-view.snap.png
new file mode 100644
index 0000000..21b6750
Binary files /dev/null and b/tests/repro/__snapshots__/top-layer-components-top-view.snap.png differ
diff --git a/tests/repro/repro1-smtpad-bottom-layer.test.ts b/tests/repro/repro1-smtpad-bottom-layer.test.ts
new file mode 100644
index 0000000..8f05d10
--- /dev/null
+++ b/tests/repro/repro1-smtpad-bottom-layer.test.ts
@@ -0,0 +1,42 @@
+import { test, expect } from "bun:test"
+import { renderGLTFToPNGBufferFromGLBBuffer } from "poppygl"
+import { convertCircuitJsonToGltf } from "../../lib/index"
+import type { CircuitJson } from "circuit-json"
+import * as fs from "node:fs"
+import * as path from "node:path"
+
+test("bottom-layer-components-bottom-view", async () => {
+  const bottomLayerPath = path.join(
+    __dirname,
+    "../fixtures/smtpad-bottom-layer.json",
+  )
+
+  const circuitData = fs.readFileSync(bottomLayerPath, "utf-8")
+  const circuitJson: CircuitJson = JSON.parse(circuitData)
+
+  // Convert circuit to GLTF (GLB format for rendering)
+  const glbResult = await convertCircuitJsonToGltf(circuitJson, {
+    format: "glb",
+    boardTextureResolution: 512,
+    includeModels: true,
+    showBoundingBoxes: false,
+  })
+
+  // Ensure we got a valid GLB buffer
+  expect(glbResult).toBeInstanceOf(ArrayBuffer)
+  expect((glbResult as ArrayBuffer).byteLength).toBeGreaterThan(0)
+
+  // Custom camera to view from BELOW the board
+  const cameraOptions = {
+    position: { x: 15, y: -15, z: -15 }, // Position below and to the side
+    target: { x: 0, y: 0, z: 0 }, // Look at board center
+    up: { x: 0, y: 1, z: 0 },
+    fov: 50,
+    width: 800,
+    height: 600,
+  }
+
+  expect(
+    renderGLTFToPNGBufferFromGLBBuffer(glbResult as ArrayBuffer, cameraOptions),
+  ).toMatchPngSnapshot(import.meta.path, "bottom-layer-components-bottom-view")
+})
diff --git a/tests/repro/repro2-smtpad-top-layer.test.ts b/tests/repro/repro2-smtpad-top-layer.test.ts
new file mode 100644
index 0000000..022b45c
--- /dev/null
+++ b/tests/repro/repro2-smtpad-top-layer.test.ts
@@ -0,0 +1,39 @@
+import { test, expect } from "bun:test"
+import { renderGLTFToPNGBufferFromGLBBuffer } from "poppygl"
+import { convertCircuitJsonToGltf } from "../../lib/index"
+import type { CircuitJson } from "circuit-json"
+import * as fs from "node:fs"
+import * as path from "node:path"
+
+test("top-layer-components-top-view", async () => {
+  const topLayerPath = path.join(__dirname, "../fixtures/smtpad-top-layer.json")
+
+  const circuitData = fs.readFileSync(topLayerPath, "utf-8")
+  const circuitJson: CircuitJson = JSON.parse(circuitData)
+
+  // Convert circuit to GLTF (GLB format for rendering)
+  const glbResult = await convertCircuitJsonToGltf(circuitJson, {
+    format: "glb",
+    boardTextureResolution: 512,
+    includeModels: true,
+    showBoundingBoxes: false,
+  })
+
+  // Ensure we got a valid GLB buffer
+  expect(glbResult).toBeInstanceOf(ArrayBuffer)
+  expect((glbResult as ArrayBuffer).byteLength).toBeGreaterThan(0)
+
+  // Custom camera to view from BELOW the board
+  const cameraOptions = {
+    position: { x: 15, y: -15, z: 15 }, // Position below and to the side
+    target: { x: 0, y: 0, z: 0 }, // Look at board center
+    up: { x: 0, y: 1, z: 0 },
+    fov: 50,
+    width: 800,
+    height: 600,
+  }
+
+  expect(
+    renderGLTFToPNGBufferFromGLBBuffer(glbResult as ArrayBuffer, cameraOptions),
+  ).toMatchPngSnapshot(import.meta.path, "top-layer-components-top-view")
+})