diff --git a/3D_Models/Holder.scad b/3D_Models/Holder.scad
--- a/3D_Models/Holder.scad
+++ b/3D_Models/Holder.scad
@@ -4,20 +4,19 @@ overall_thickness = 15;
 neopixel_holder_thickness = 7.5;
 translucent_disk_thickness = overall_thickness - neopixel_holder_thickness;
 
-ring_24_outer_diameter = 65.6 + 0.5;
-ring_24_inner_diameter = 52.3 - 0.5;
+ring_24_outer_diameter = 65.6 + 0.7;
+ring_24_inner_diameter = 52.3 - 0.7;
 
-ring_12_outer_diameter = 36.8 + 0.5;
-ring_12_inner_diameter = 23.3 - 0.5;
+ring_12_outer_diameter = 36.8 + 0.7;
+ring_12_inner_diameter = 23.3 - 0.7;
 
-ring_thickness = 6.7;
+ring_thickness = 6.7 + 0.2;
 ring_z_offset = neopixel_holder_thickness - ring_thickness;
 
 channel_length = ring_24_inner_diameter/2;
 channel_width = 4;
 channel_angle = 32.5;
-main_channel_diameter = 10;
-
+main_channel_diameter = 12;
 
 alignment_pin_position = (-overall_outer_diameter/2) + 1.5; 
 alignment_pin_width = 4;
@@ -58,7 +57,9 @@ module neopixel_holder() {
         
         cylinder(h=neopixel_holder_thickness, d=overall_outer_diameter);
         
-        for (d=[[ring_24_outer_diameter, ring_24_inner_diameter], [ring_12_outer_diameter, ring_12_inner_diameter]])
+        for (d=[[ring_24_outer_diameter, ring_24_inner_diameter],
+                [ring_12_outer_diameter, ring_12_inner_diameter]]
+        )
             translate([0, 0, ring_z_offset])
                 ring(h=ring_thickness+1, od=d[0], id=d[1]);
         channel();