diff --git a/top_bottom_plates_custom.scad b/top_bottom_plates_custom.scad
index d8c2f49..8548256 100644
--- a/top_bottom_plates_custom.scad
+++ b/top_bottom_plates_custom.scad
@@ -15,15 +15,20 @@ module bumper_hole() {
 module arm_hole(angle) {
     rotate([0, 0, angle]) {
         //cube(size=[13, 22, 4], center = true);
-        translate([-12.5, -14, 1.9])
-            cylinder(d = 3, center = true, h = 4);
-        translate([ 13  , -14, 1.9])
-            cylinder(d = 3, center = true, h = 4);
         if (mode == "top") {
+            translate([-12.5, -14, 1.9])
+                cylinder(d = 3, center = true, h = 4);
+            translate([ 13  , -14, 1.9])
+                cylinder(d = 3, center = true, h = 4);
             translate([-12.5,  11.5, 1.9])
                 cylinder(d = 3, center = true, h = 4);
             translate([ 13  ,  11.5, 1.9])
                 cylinder(d = 3, center = true, h = 4);
+        } else {
+            translate([-12.5, -14, 1.9])
+                cylinder(d = 4.5, center = true, h = 4);
+            translate([ 13  , -14, 1.9])
+                cylinder(d = 4.5, center = true, h = 4);
         }
     }
 }