diff --git a/scad/bellows.scad b/scad/bellows.scad
index 62f6b20..5a33bfb 100644
--- a/scad/bellows.scad
+++ b/scad/bellows.scad
@@ -23,7 +23,7 @@ module bellows_camera_board () {
     difference () {
         cube([60, 60, H], center = true);
         //center
-        cylinder(r = 38 / 2, h = H + 1, center = true, $fn = 360);
+        cylinder(r = 39 / 2, h = H + 1, center = true, $fn = 360);
         //center bevels
         translate([0, 0, 2.25]) cylinder(r1 = 36 / 2, r2 = 40 / 2, h = 1.5, center = true, $fn = 360);
         translate([0, 0, -2.25]) cylinder(r1 = 40 / 2, r2 = 36 / 2, h = 1.5, center = true, $fn = 360);
@@ -53,7 +53,7 @@ module camera_mount () {
     }
 }
 
-PART = "camera_mount";
+PART = "bellows_camera_board";
 
 if (PART == "bellows_camera_board") {
     bellows_camera_board();