diff --git a/common.scad b/common.scad
index a14fa34..9782ad3 100644
--- a/common.scad
+++ b/common.scad
@@ -1,3 +1,5 @@
+IN = 25.4;
+
 
 echo("common.scad - rounded_cube()");
 module rounded_cube (cube_arr = [1, 1, 1], d = 0, center = false) {
diff --git a/daylight_spool_mount.scad b/daylight_spool_mount.scad
index db10c98..687be43 100644
--- a/daylight_spool_mount.scad
+++ b/daylight_spool_mount.scad
@@ -1,26 +1,29 @@
 SQUARE_INNER = 7.8;
 time = 0;
 
-module reel_holder (top = true, base = true) {
+module reel_holder (top = true, base = true, height = 18.5) {
 	$fn = 60;
+	topHeight = 3.5;
 	difference(){
 		translate([0, 0, -1.5]) cube([SQUARE_INNER, SQUARE_INNER, 21.5], center= true);
 		for (i = [0:4]) {
 			rotate([0, 0, (i * 90)]){
-				translate([(SQUARE_INNER / 2) + .4, (SQUARE_INNER / 2) + .4, 18.5 / 2]) rotate([0, -15, 45]) cube([2.5, SQUARE_INNER, SQUARE_INNER], center = true);
+				translate([(SQUARE_INNER / 2) + .4, (SQUARE_INNER / 2) + .4, height / 2]) rotate([0, -15, 45]) cube([2.5, SQUARE_INNER, SQUARE_INNER], center = true);
 			}
 		}		
 	}
-	difference () {
-		union() {
-			translate([0, 0, (18.5 / 2) + (3.5 / 2)]) cylinder(r = SQUARE_INNER / 2, h = 3.5, center = true);
-			translate([0, 0, (18.5 / 2) + (7.5 / 2)]) sphere(SQUARE_INNER / 2);
+	if (top) {
+		difference () {
+			union() {
+				translate([0, 0, (height / 2) + (topHeight / 2)]) cylinder(r = SQUARE_INNER / 2, h = topHeight, center = true);
+				translate([0, 0, (height / 2) + (7.5 / 2)]) sphere(SQUARE_INNER / 2);
+			}
+			translate ([0, 0, (height / 2) + 7.5]) cube([10, 10, 2], center = true);
 		}
-		translate ([0, 0, (18.5 / 2) + 7.5]) cube([10, 10, 2], center = true);
 	}
 	if (base) {
 	    difference () {
-	        translate([0, 0, -(18.5/ 2) - (3 / 2) - 3]) cylinder(r = 16 /2, h = 3, center = true);
+	        translate([0, 0, -(height / 2) - (3 / 2) - 3]) cylinder(r = 16 /2, h = 3, center = true);
 	        //translate([0, 0, -14.3]) cube([4, 4, 2], center = true); //notch
 	        difference() {
 	            translate([0, 0, -14.3]) cylinder(r = 8 / 2, h = 2, center = true);
diff --git a/takeup.scad b/takeup.scad
index e43670c..32a9866 100755
--- a/takeup.scad
+++ b/takeup.scad
@@ -13,6 +13,8 @@ MOTOR_SHAFT_HOBBLE = 1;
 MOTOR_MOUNT_X = 32.5;
 MOTOR_MOUNT_Y = 17.5;
 
+M4 = 4.1;
+
 module hex (diag = 10, h = 1) {
     cylinder(r = diag / 2, h = h, center = true, $fn = 6);
 }
@@ -96,7 +98,8 @@ module slip_coupling (MAGNET_H = 2.5) {
 }
 
 module daylight_spool_insert () {
-    translate([0, 0, 14]) reel_holder(true, false);
+    translate([0, 0, 15.9]) reel_holder(false, false);
+    translate([0, 0, 3.25]) cylinder(r = R(18), h = 1.5, center = true, $fn = 240);
     union () {
         cube([25 - .4, 10 - .4, 5], center = true);
         cube([10 - .4, 25 - .4, 5], center = true);
@@ -185,6 +188,57 @@ module minimal_mount () {
     }
 }
 
+module m4_nut (H = 3.1) {
+    cylinder(r = R(8.1), h = 3.1, center = true, $fn = 6);
+}
+
+module daylight_spool_insert_reinforced () {
+    //internally Hex M4 40mm
+    difference () {
+        daylight_spool_insert();
+        cylinder(r = R(M4), h = 100, center = true, $fn = 60);
+        translate([0, 0, -1]) m4_nut();
+    }
+}
+
+module daylight_spool_insert_reinforced_nut () {
+    D = 30;
+    H = 6;
+    BUMPS = 60;
+    BUMP_D = 1.2;
+    difference() {
+        union () {
+            cylinder(r = R(D), h = H, center = true, $fn = 120);
+            for (i = [0 : BUMPS - 1]) {
+                rotate([0, 0, i * (360 / BUMPS)]) {
+                    translate([R(D) - .1, 0, 0]) cylinder(r = R(BUMP_D), h = H, center = true, $fn = 20);
+                }
+            }
+        }
+        //m4
+        translate([0 , 0, (H / 2) - (3.1 / 2) + 0.01]) m4_nut();
+        cylinder(r = R(M4), h = 100, center = true, $fn = 60);
+        //under void
+        translate([0, 0, -4]) cylinder(r = R(15), h = H, center = true, $fn = 120);
+        //top void
+        translate([0, 0, 4]) difference () {
+            cylinder(r = R(25), h = H, center = true, $fn = 120);
+            cylinder(r = R(12), h = H, center = true, $fn = 120);
+        }
+        //bevels
+        translate([0, 0, (H / 2) - (1 / 2)]) difference () {
+            cylinder(r = R(D) + 5, h = 1, center = true, $fn = 240);
+            cylinder(r2 = R(D), r1 = R(D) + 1, h = 1, center = true, $fn = 240);
+        }
+        
+        translate([0, 0, (H / 2) - (1 / 2)]) difference () {
+            cylinder(r = R(D) + 5, h = 1, center = true, $fn = 240);
+            cylinder(r2 = R(D), r1 = R(D) + 1, h = 1, center = true, $fn = 240);
+        }
+    }
+
+}
+
 module debug_assembled () {
     translate([(46 / 2) - 14.5, 0, 0]) rotate([180, 0, 0]) geared_motor();
     color("green") translate([0, 0, 11]) mount_plate();
@@ -196,7 +250,7 @@ module debug_assembled () {
     color("red") translate([0, 0, 34]) daylight_spool_insert();
 }
 
-PART = "mount_plate";
+PART = "daylight_spool_insert_reinforced_nut";
 
 if (PART == "slip_coupling") {
     slip_coupling();
@@ -209,6 +263,10 @@ if (PART == "slip_coupling") {
     daylight_spool_insert();
 } else if (PART == "minimal_mount") {
     minimal_mount();
+} else if (PART == "daylight_spool_insert_reinforced") {
+    daylight_spool_insert_reinforced();
+} else if (PART == "daylight_spool_insert_reinforced_nut") {
+    daylight_spool_insert_reinforced_nut();
 } else if (PART == "debug") {
     debug_assembled();
 }