diff --git a/GameData/FreeIva/CST/CST100internal.cfg b/GameData/FreeIva/CST/CST100internal.cfg
new file mode 100644
index 0000000..9f579ea
--- /dev/null
+++ b/GameData/FreeIva/CST/CST100internal.cfg
@@ -0,0 +1,51 @@
+@PART[CST-100?capsule]:HAS[!MODULE[ModuleFreeIva]]:FOR[FreeIva]
+{
+	MODULE
+	{
+		name = ModuleFreeIva
+	}
+}
+
+@INTERNAL[CST100internal]:HAS[!MODULE[InternalModuleFreeIva]]:FOR[FreeIva]
+{
+	FreeIva_InternalModel = CST100internal
+}
+
+// NOTE: ROCapsules also uses this internal
+@INTERNAL:HAS[#FreeIva_InternalModel[CST100internal]&!MODULE[InternalModuleFreeIva]]:AFTER[FreeIva]
+{
+	MODEL
+	{
+		model = FreeIva/CST/CST100internal
+	}
+
+	MODULE
+	{
+		name = InternalModuleFreeIva
+		shellColliderName = shellCollider
+		Reparent
+		{
+			childTransformName = Docking_Hatch_Collider
+			parentTransformName = Docking_Hatch
+		}
+		Cut
+		{
+			target = Internal
+			type = Mesh
+			tool = cutout
+		}
+	}
+
+	PROP
+	{
+		name = FreeIva_Hatch_Invisible
+		position = -1.05681598, 0.49770543, -0.297330499
+	}
+
+	MODULE
+	{
+		name = FreeIvaHatch
+		doorTransformName = Docking_Hatch
+		tubeTransformName = tube
+	}
+}
\ No newline at end of file
diff --git a/GameData/FreeIva/CST/CST100internal.mu b/GameData/FreeIva/CST/CST100internal.mu
new file mode 100644
index 0000000..845caf1
Binary files /dev/null and b/GameData/FreeIva/CST/CST100internal.mu differ
diff --git a/Models/CST/CST100internal.blend b/Models/CST/CST100internal.blend
new file mode 100644
index 0000000..925befd
Binary files /dev/null and b/Models/CST/CST100internal.blend differ