diff --git a/changelog.md b/changelog.md
index 54cc71d6a..e377c26df 100644
--- a/changelog.md
+++ b/changelog.md
@@ -1,5 +1,9 @@
 # Adafruit nRF52 Arduino Core Changelog
 
+## 0.18.0 - 2020.02.03
+
+- Add EXTERNAL_FLASH_USE_QSPI to all variants that has on-board flash
+
 ## 0.17.0 - 2020.02.01
 
 ### Core
diff --git a/libraries/Bluefruit52Lib/library.properties b/libraries/Bluefruit52Lib/library.properties
index 8a6375c01..208b34b28 100644
--- a/libraries/Bluefruit52Lib/library.properties
+++ b/libraries/Bluefruit52Lib/library.properties
@@ -1,5 +1,5 @@
 name=Adafruit Bluefruit nRF52 Libraries
-version=0.17.0
+version=0.18.0
 author=Adafruit
 maintainer=Adafruit <info@adafruit.com>
 sentence=Arduino library for nRF52-based Adafruit Bluefruit LE modules
diff --git a/platform.txt b/platform.txt
index 2a53c2a27..efea43618 100644
--- a/platform.txt
+++ b/platform.txt
@@ -17,7 +17,7 @@
 # Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 
 name=Adafruit nRF52 Boards
-version=0.17.0
+version=0.18.0
 
 # Compile variables
 # -----------------
diff --git a/variants/circuitplayground_nrf52840/variant.h b/variants/circuitplayground_nrf52840/variant.h
index a7472709e..aa6e5a740 100644
--- a/variants/circuitplayground_nrf52840/variant.h
+++ b/variants/circuitplayground_nrf52840/variant.h
@@ -133,9 +133,6 @@ static const uint8_t SCK  = PIN_SPI_SCK ;
 #define EXTERNAL_FLASH_DEVICES   GD25Q16C
 #define EXTERNAL_FLASH_USE_QSPI
 
-#define USB_MSC_BLOCK_SIZE    512
-#define USB_MSC_BLOCK_COUNT   ((2*1024*1024) / USB_MSC_BLOCK_SIZE)
-
 /*
  * PDM Interfaces
  */
diff --git a/variants/clue_nrf52840/variant.h b/variants/clue_nrf52840/variant.h
index 4aa807f8f..f37b91761 100644
--- a/variants/clue_nrf52840/variant.h
+++ b/variants/clue_nrf52840/variant.h
@@ -133,9 +133,6 @@ static const uint8_t SCK1  = PIN_SPI1_SCK ;
 #define EXTERNAL_FLASH_DEVICES   GD25Q16C
 #define EXTERNAL_FLASH_USE_QSPI
 
-#define USB_MSC_BLOCK_SIZE    512
-#define USB_MSC_BLOCK_COUNT   ((2*1024*1024) / USB_MSC_BLOCK_SIZE)
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/variants/feather_nrf52840_express/variant.h b/variants/feather_nrf52840_express/variant.h
index 695f4c8d6..c64a37280 100644
--- a/variants/feather_nrf52840_express/variant.h
+++ b/variants/feather_nrf52840_express/variant.h
@@ -130,9 +130,6 @@ static const uint8_t SCK  = PIN_SPI_SCK ;
 #define EXTERNAL_FLASH_DEVICES   GD25Q16C
 #define EXTERNAL_FLASH_USE_QSPI
 
-#define USB_MSC_BLOCK_SIZE    512
-#define USB_MSC_BLOCK_COUNT   ((2*1024*1024) / USB_MSC_BLOCK_SIZE)
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/variants/feather_nrf52840_sense/variant.h b/variants/feather_nrf52840_sense/variant.h
index 865ed8bee..5924cb166 100644
--- a/variants/feather_nrf52840_sense/variant.h
+++ b/variants/feather_nrf52840_sense/variant.h
@@ -134,9 +134,6 @@ static const uint8_t SCK  = PIN_SPI_SCK ;
 #define EXTERNAL_FLASH_DEVICES   GD25Q16C
 #define EXTERNAL_FLASH_USE_QSPI
 
-#define USB_MSC_BLOCK_SIZE    512
-#define USB_MSC_BLOCK_COUNT   ((2*1024*1024) / USB_MSC_BLOCK_SIZE)
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/variants/itsybitsy_nrf52840_express/variant.h b/variants/itsybitsy_nrf52840_express/variant.h
index e8c41bad0..22bf5a79d 100644
--- a/variants/itsybitsy_nrf52840_express/variant.h
+++ b/variants/itsybitsy_nrf52840_express/variant.h
@@ -126,9 +126,6 @@ static const uint8_t SCK  = PIN_SPI_SCK ;
 #define EXTERNAL_FLASH_DEVICES   GD25Q16C
 #define EXTERNAL_FLASH_USE_QSPI
 
-#define USB_MSC_BLOCK_SIZE    512
-#define USB_MSC_BLOCK_COUNT   ((2*1024*1024) / USB_MSC_BLOCK_SIZE)
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/variants/metro_nrf52840_express/variant.h b/variants/metro_nrf52840_express/variant.h
index acca4b4ae..852a147c3 100644
--- a/variants/metro_nrf52840_express/variant.h
+++ b/variants/metro_nrf52840_express/variant.h
@@ -132,10 +132,6 @@ static const uint8_t SCK  = PIN_SPI_SCK ;
 #define EXTERNAL_FLASH_DEVICES   GD25Q16C
 #define EXTERNAL_FLASH_USE_QSPI
 
-#define USB_MSC_BLOCK_SIZE    512
-#define USB_MSC_BLOCK_COUNT   ((2*1024*1024) / USB_MSC_BLOCK_SIZE)
-
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/variants/particle_xenon/variant.cpp b/variants/particle_xenon/variant.cpp
index ac732d9a8..ba8b001e9 100644
--- a/variants/particle_xenon/variant.cpp
+++ b/variants/particle_xenon/variant.cpp
@@ -53,12 +53,7 @@ const uint32_t g_ADigitalPinMap[] =
   18,   // P0.18 (RESET)
 };
 
-void initVariant()
-{
-  switch_antenna(false);
-}
-
-void switch_antenna(bool useExternal) {
+static void switch_antenna(bool useExternal) {
   if (useExternal) {
     digitalWrite(ANTENNA_SWITCH_1, LOW);
     digitalWrite(ANTENNA_SWITCH_2, HIGH);
@@ -69,57 +64,7 @@ void switch_antenna(bool useExternal) {
   }
 }
 
-void led_pwm_init(uint32_t led_index, uint32_t led_pin) {
-  NRF_PWM_Type* pwm    = NRF_PWM0;
-
-  pwm->ENABLE = 0;
-
-  nrf_gpio_cfg_output(led_pin);
-  nrf_gpio_pin_write(led_pin, 1 - LED_STATE_ON);
-
-  pwm->PSEL.OUT[led_index] = led_pin;
-
-  pwm->MODE            = PWM_MODE_UPDOWN_Up;
-  pwm->COUNTERTOP      = 0xff;
-  pwm->PRESCALER       = PWM_PRESCALER_PRESCALER_DIV_16;
-  pwm->DECODER         = PWM_DECODER_LOAD_Individual;
-  pwm->LOOP            = 0;
-
-  pwm->SEQ[0].PTR      = (uint32_t) (led_duty_cycles);
-  pwm->SEQ[0].CNT      = 4; // default mode is Individual --> count must be 4
-  pwm->SEQ[0].REFRESH  = 0;
-  pwm->SEQ[0].ENDDELAY = 0;
-
-  pwm->ENABLE = 1;
-
-  pwm->EVENTS_SEQEND[0] = 0;
-//  pwm->TASKS_SEQSTART[0] = 1;
-}
-
-void led_pwm_teardown(void) {
-  pwm_teardown(NRF_PWM0);
-}
-
-void led_pwm_duty_cycle(uint32_t led_index, uint16_t duty_cycle) {
-  led_duty_cycles[led_index] = duty_cycle;
-  nrf_pwm_event_clear(NRF_PWM0, NRF_PWM_EVENT_SEQEND0);
-  nrf_pwm_task_trigger(NRF_PWM0, NRF_PWM_TASK_SEQSTART0);
+void initVariant()
+{
+  switch_antenna(false);
 }
-
-void pwm_teardown(NRF_PWM_Type* pwm) {
-  pwm->TASKS_SEQSTART[0] = 0;
-  pwm->ENABLE            = 0;
-
-  pwm->PSEL.OUT[0] = 0xFFFFFFFF;
-  pwm->PSEL.OUT[1] = 0xFFFFFFFF;
-  pwm->PSEL.OUT[2] = 0xFFFFFFFF;
-  pwm->PSEL.OUT[3] = 0xFFFFFFFF;
-
-  pwm->MODE        = 0;
-  pwm->COUNTERTOP  = 0x3FF;
-  pwm->PRESCALER   = 0;
-  pwm->DECODER     = 0;
-  pwm->LOOP        = 0;
-  pwm->SEQ[0].PTR  = 0;
-  pwm->SEQ[0].CNT  = 0;
-}
\ No newline at end of file
diff --git a/variants/particle_xenon/variant.h b/variants/particle_xenon/variant.h
index 1c04ad23b..66d876480 100644
--- a/variants/particle_xenon/variant.h
+++ b/variants/particle_xenon/variant.h
@@ -184,18 +184,6 @@ static const uint8_t SCK1  = PIN_SPI1_SCK;
 #define EXTERNAL_FLASH_DEVICES   GD25Q16C
 #define EXTERNAL_FLASH_USE_QSPI
 
-#define USB_MSC_BLOCK_SIZE    512
-#define USB_MSC_BLOCK_COUNT   ((2*1024*1024) / USB_MSC_BLOCK_SIZE)
-
-void switch_antenna(bool useExternal);
-
-// led pwm
-void led_pwm_init(uint32_t led_index, uint32_t led_pin);
-void led_pwm_teardown(void);
-void led_pwm_duty_cycle(uint32_t led_index, uint16_t duty_cycle);
-void pwm_teardown(NRF_PWM_Type* pwm);
-static uint16_t led_duty_cycles[PWM0_CH_NUM] = { 0 };
-
 #ifdef __cplusplus
 }
 #endif
diff --git a/variants/pca10056/variant.h b/variants/pca10056/variant.h
index 0f2899679..e9aa38db5 100644
--- a/variants/pca10056/variant.h
+++ b/variants/pca10056/variant.h
@@ -137,9 +137,6 @@ static const uint8_t SCK  = PIN_SPI_SCK ;
 #define EXTERNAL_FLASH_DEVICES   MX25R6435F
 #define EXTERNAL_FLASH_USE_QSPI
 
-#define USB_MSC_BLOCK_SIZE    512
-#define USB_MSC_BLOCK_COUNT   ((8*1024*1024) / USB_MSC_BLOCK_SIZE)
-
 #ifdef __cplusplus
 }
 #endif