diff --git a/standoff.py b/standoff.py
index 723ce4a..e6b5581 100644
--- a/standoff.py
+++ b/standoff.py
@@ -8,12 +8,21 @@ from frame_params import PLATE_GAP
 
 OD = 3.5                 # round M2 standoff
 ALU_DENSITY = 2.70e-3    # g/mm3, for mass reporting
+PLATE_GAP=16
 
 
 def standoff():
     p = (cq.Workplane("XY")
          .circle(OD / 2.0)
-         .extrude(PLATE_GAP))
+         .extrude(PLATE_GAP)
+         )
+
+    cut = (cq.Workplane("XY")
+           .circle(1)
+           .extrude(PLATE_GAP)
+           )
+
+    p = p.cut(cut)
 
     return p