diff --git a/scad/bellows.scad b/scad/bellows.scad
index cc03c5a..fe305bf 100644
--- a/scad/bellows.scad
+++ b/scad/bellows.scad
@@ -1,4 +1,22 @@
+module cmount_male(len = 4) {
+	inner_d = 23;
+	outer_d = 24.7;
+	f_inner_d = 25.4;
+	f_outer_d = 28.6;
+	translate ([0, 0, len / 2 ]) {
+		difference () {
+			union () {
+				cylinder(r = outer_d / 2, h = len, center = true);
+			}
+			cylinder(r = inner_d / 2, h = len + 1, center = true);
+		}
 
+		difference () {
+			translate([0, 0, -(len / 2) - 1]) cylinder(r = f_outer_d / 2, h = 2, center = true);
+			translate([0, 0, -(len / 2) - 1]) cylinder(r1 = f_inner_d / 2, r2 = inner_d / 2, h = 3, center = true);
+		}	
+	}
+}
 
 module bellows_camera_board () {
     H = 6;
@@ -13,8 +31,27 @@ module bellows_camera_board () {
         for (i = [0 : 3]) {
             rotate([0, 0, i * (360 / 4) + 45 ]) translate([43.5, 0, 0]) cube([11, 11, H + 1], center = true);
         }
+        //bolt
+        translate([0, 30, 0]) rotate([90, 0, 0]) cylinder(r = 2.2, h = 30, center = true, $fn = 30);
     }
-
 }
 
-bellows_camera_board();
\ No newline at end of file
+module camera_mount () {
+    $fn = 360;
+    cmount_male(5);
+    translate([0, 0, -4]) {
+        difference() {
+            cylinder(r = 42 / 2, h = 4, center = true);
+            cylinder(r = 26 / 2, h = 4 + 1, center = true);
+        }
+    }
+    translate([0, 0, -4 - 5]) {
+        difference() {
+            cylinder(r = 37.9 / 2, h = 7, center = true);
+            cylinder(r = 30 / 2, h = 7 + 1, center = true);
+        }
+    }
+}
+
+bellows_camera_board();
+//translate([0, 0, 9]) color("red") camera_mount();
\ No newline at end of file