diff --git a/examples/JK_projector_takeup.scad b/examples/JK_projector_takeup.scad
index 4164269..f9a0ff7 100644
--- a/examples/JK_projector_takeup.scad
+++ b/examples/JK_projector_takeup.scad
@@ -37,16 +37,24 @@ module block () {
     cube([AX, AY, AZ], center = true);
     translate([0, -(AY - BY) / 2, (AZ / 2) + (BZ / 2)]) {
         difference () {
-            cube([BX, BY, BZ], center = true);
+            union () {
+                cube([BX, BY, BZ], center = true);
+                translate([BOLTSX / 2, (BY / 2) - 3.5, 0]) {
+                    cylinder(r= R(13), h = BZ, center = true, $fn = 60);
+                }
+                translate([-BOLTSX / 2, (BY / 2) - 3.5, 0]) {
+                    cylinder(r= R(13), h = BZ, center = true, $fn = 60);
+                }
+            }
             translate([0, BY - 5.44, 0]) cube([53.2, BY, BZ + 1], center = true);
             //bolts
             translate([0, (BY / 2) - 3.5, 0]) {
                 translate([BOLTSX / 2, 0, 0]) {
-                    cylinder(r = 4 / 2, h = BZ + 1, center = true, $fn = 50);
+                    cylinder(r = 4.95 / 2, h = BZ + 1, center = true, $fn = 50);
                     translate([0, 0, 3]) m5_nut();
                 }
                 translate([-BOLTSX / 2, 0, 0]) {
-                    cylinder(r = 4 / 2, h = BZ + 1, center = true, $fn = 50);
+                    cylinder(r = 4.95 / 2, h = BZ + 1, center = true, $fn = 50);
                     translate([0, 0, 3]) m5_nut();
                 }
             }   
@@ -70,7 +78,6 @@ module projector_mount () {
 }
 
 module projector_arm () {
-    
 	difference () {
 		union () {
 			cube([ARM_LENGTH, ARM_WIDTH, ARM_HEIGHT], center = true);
@@ -106,7 +113,7 @@ module filter_reinforcement () {
 }
 
 module roller_bolts () {
-
+    
 }
 
 module jk_takeup () {
@@ -116,7 +123,7 @@ module jk_takeup () {
             translate([0, 0, -27.5]) filter_holder();
             translate([0, -1.1, -16]) filter_reinforcement();
         }
-        roller_bolts();
+        //roller_bolts();
     }
     translate([0, 0, 1.8]) {
         translate([-30, 0, 0]) rotate([0, 0, ARMS_ANGLE]) {