diff --git a/gantry.py b/gantry.py
index 8a64a6d..9538064 100644
--- a/gantry.py
+++ b/gantry.py
@@ -528,7 +528,10 @@ class Carrier:
             cq.Workplane()
             .copyWorkplane(carriage.plate.workplaneFromTagged("carriage_plate"))
             .rect(60, 60)
-            .extrude(36)
+            .extrude(28)
+            .faces(">z")
+            .rect(32, 60)
+            .extrude(8)
             .copyWorkplane(
                 carriage.plate.workplaneFromTagged("carriage_plate").transformed(
                     rotate=(180, 0, 0)