diff --git a/src/dactyl_keyboard/dactyl.clj b/src/dactyl_keyboard/dactyl.clj
index 42b9a89..8ab002c 100644
--- a/src/dactyl_keyboard/dactyl.clj
+++ b/src/dactyl_keyboard/dactyl.clj
@@ -616,10 +616,10 @@
          (translate (map + offset [(first position) (second position) (/ height 2)])))))
 
 (defn screw-insert-all-shapes [bottom-radius top-radius height]
-  (union (screw-insert 0 0         bottom-radius top-radius height [9 10 0])
+  (union (screw-insert 0 0         bottom-radius top-radius height [9 9 0])
          (screw-insert 0 lastrow   bottom-radius top-radius height [0 8 0])
          (screw-insert 3 lastrow  bottom-radius top-radius height [9 4 0])
-         (screw-insert 3 0         bottom-radius top-radius height [6 -3 0])
+         (screw-insert lastcol 0         bottom-radius top-radius height [-3 6 0])
          (screw-insert 1 lastrow         bottom-radius top-radius height [0 -16 0])))
 
 ; Hole Depth Y: 4.4