diff --git a/docs/content/Modpacks/Changes/v7.5.0.md b/docs/content/Modpacks/Changes/v7.5.0.md
index efe36c8eadb..f7adb890ff2 100644
--- a/docs/content/Modpacks/Changes/v7.5.0.md
+++ b/docs/content/Modpacks/Changes/v7.5.0.md
@@ -10,6 +10,9 @@ We have added a second Generic argument to our (Multiblock)MachineBuilder. This
 ## Machine & Cover Copy/Paste System
 A new system for copying machines using the Machine Memory Card has been added, see [this page](../Other-Topics/Cover-Machine-Copy-Paste-Support.md) if you want to add extra copy/paste behaviour to your own machines and covers.
 
+## Multiblock Structure Change
+The Large Fractionating Still no longer requires a muffler hatch, allowing it to be used in cleanrooms.
+
 ## RecipeCondition Generics
 We have added a Generic argument to `RecipeCondition` describing the condition.  
 This means that your custom recipe conditions now need to extend `RecipeCondition<MyCondition>` (whereas before they just extended `RecipeCondition`).
@@ -71,4 +74,4 @@ you should **NOT** use `PipeModel#dynamicModel()` and instead set the model with
 ## Lamp Predicates
 Previously, lamps were not useable with the terminal in multiblocks. There are new lamp predicates that will help solve this problem.
 The predicate to use all lamps is: `Predicates.anyLamp()`
-The predicate to use a specific color is: `Predicates.lampsByColor(DyeColor.DYE_COLOR)`. Where DYE_COLOR is the name of the color you want.
+The predicate to use a specific color is: `Predicates.lampsByColor(DyeColor.DYE_COLOR)`. Where DYE_COLOR is the name of the color you want.
\ No newline at end of file
diff --git a/src/main/java/com/gregtechceu/gtceu/common/data/machines/GCYMMachines.java b/src/main/java/com/gregtechceu/gtceu/common/data/machines/GCYMMachines.java
index e793954c8f5..4fffdc064a9 100644
--- a/src/main/java/com/gregtechceu/gtceu/common/data/machines/GCYMMachines.java
+++ b/src/main/java/com/gregtechceu/gtceu/common/data/machines/GCYMMachines.java
@@ -636,7 +636,7 @@ public static void init() {}
                         .aisle("#YYY#", "YYYYY", "YYYYY", "YYYYY", "#YYY#")
                         .aisle("#YSY#", "YAAAY", "YAAAY", "YAAAY", "#YYY#")
                         .aisle("##X##", "#XAX#", "XAPAX", "#XAX#", "##X##").setRepeatable(1, 12)
-                        .aisle("#####", "#ZZZ#", "#ZCZ#", "#ZZZ#", "#####")
+                        .aisle("#####", "#ZZZ#", "#ZZZ#", "#ZZZ#", "#####")
                         .where('S', controller(blocks(definition.get())))
                         .where('Y', casingPredicate.or(abilities(IMPORT_ITEMS))
                                 .or(abilities(INPUT_ENERGY).setMinGlobalLimited(1).setMaxGlobalLimited(2))
@@ -646,7 +646,6 @@ public static void init() {}
                         .where('X', casingPredicate.or(exportPredicate))
                         .where('Z', casingPredicate)
                         .where('P', blocks(CASING_STEEL_PIPE.get()))
-                        .where('C', abilities(MUFFLER))
                         .where('A', air())
                         .where('#', any())
                         .build();