diff --git a/batterijhouder/fietsverlichtingEmmen/batterijX4.py b/batterijhouder/fietsverlichtingEmmen/batterijX4.py
index fa3a5ee..3338210 100644
--- a/batterijhouder/fietsverlichtingEmmen/batterijX4.py
+++ b/batterijhouder/fietsverlichtingEmmen/batterijX4.py
@@ -1,19 +1,32 @@
 from ocp_vscode import *
-from build123 import *
+from build123d import *
 
 set_port(3939)
 
-l = 31
-b = 29
-h = 58
+l = 32
+b = 30
+h = 60
+filletRad = 3
+wanddikte = 1.2
 
 with BuildPart() as box:
     with BuildSketch() as bodem:
         Rectangle(l+2.4, b+2.4)
-        fillet(bodem.vertices(), radius=10)
-    extrude(amount=4)
+        fillet(bodem.vertices(), radius=filletRad)
+    extrude(amount=wanddikte)
+    fillet(box.edges().group_by(Axis.Z)[0], radius=1.0)
+    with BuildSketch(box.faces().sort_by(Axis.Z)[-1]) as zijwand:
+        perimeter = Rectangle(l+2.4, b+2.4)
+        offset(
+            perimeter,
+            -wanddikte,
+            kind = Kind.INTERSECTION,
+            mode = Mode.SUBTRACT,
+        )
+        fillet(zijwand.vertices(), radius=filletRad)
+    extrude(amount=h)
         
 
 
-
-show_all()
+export_stl(box.part, "box.stl")
+show(box)