diff --git a/magnet holder.scad b/magnet holder.scad
index 9076af0ba28c779c8ba4376e0e5f9087f4926672..dbee6ef16f479084eb111588ade4f2fa2793e1d5 100644
--- a/magnet holder.scad	
+++ b/magnet holder.scad	
@@ -2,6 +2,7 @@ include <rack_herringbone.scad>;
 include <MCAD/motors.scad>;
 include <MCAD/nuts_and_bolts.scad>;
 include <MCAD/involute_gears.scad>;
+include <MCAD/regular_shapes.scad>;
 
 // gear parameters
 circular_pitch=350;
@@ -20,11 +21,9 @@ rodRad=3;
 linearBearingOD=12;
 linearBearingHeight=19;
 
-
-
 union(){
     translate([-80,0,0]){
-//        color("blue") magnetPlate();
+        color("blue") magnetPlate();
         color("red") pillar(30);
         
         translate([40,0,-15])
@@ -76,7 +75,7 @@ module magnetPlate(){
     }
 }
 module pillar(spacing = 30){
-    thickness = 10;
+    thickness = 8;
     width = 50;
     length = 80;
     cavitySideThickness = 10;
@@ -86,7 +85,7 @@ module pillar(spacing = 30){
     innerRadius=0;//shaft radius, in mm
     borders=5;//how thick should the borders around the central "shaft" be, in mm
     
-    translate([0, -width/2, -thickness/2])
+    translate([0, -width/2, -thickness/2+1])
     difference(){
         cube([length,width,thickness]);
         for (y = [width/2-spacing/2, width/2+spacing/2]){ // M3 nut/bolt holes
@@ -104,7 +103,7 @@ module pillar(spacing = 30){
             cube([length-cavityEndThickness*2, width-cavitySideThickness*2, thickness+2]);
     }
     
-    translate([length/2, -width/2+7.2, -thickness/2+2])
+    translate([length/2, -width/2+7.2, -thickness/2+1])
     rotate([0,0,180])
         rack(innerRadius, borders, 180/circular_pitch*20, 10, pressureAngle*pi/180, centerAngle);
 
@@ -184,6 +183,20 @@ module motorSide(){
         }
     }
     
+    
+    rotate([0,0,180])
+    translate([length/2-3, 0, 0]){
+        difference(){
+            translate([0, 0, (thickness+2)/2])
+                difference(){
+                    cube([10.6, 19.8, thickness+2], center = true);
+                    cube([11, 3, thickness+3], center = true);
+                }
+            translate([0, 0, thickness+2])
+                microswitch(mockup = true, holeDepth = thickness+4, nutSpacing = 3);
+        }
+    }
+
 }
 
 module bearingClamp(){
@@ -224,7 +237,7 @@ module pinion(teeth){
     bore_diameter = innerRadius;
 
 	//sets nut trap boss dimensions
-	boss_length = 15/2 + 2;
+	boss_length = 15/2 + 1;
 	boss_width = trap_width + 3;
 	trap_length = trap_width/2;
 	
@@ -254,7 +267,7 @@ module pinion(teeth){
 			rim_thickness = height/2,
 			rim_width = 10,
 			hub_thickness = height,
-			hub_diameter=18,
+			hub_diameter=17,
 			bore_diameter=bore_diameter,
 			circles=4,
 			twist=twist);
@@ -274,4 +287,20 @@ module pinion(teeth){
 		}
 	}
     
+}
+module microswitch(mockup = true, holeDepth = 0, nutSpacing = 0){
+    $fn = 50;
+    
+    translate([-10.6/2, -19.8/2, 0]){
+        if (mockup == true){
+            %cube([10.6, 19.8, 6.4]);
+        }
+        
+        for (y = [5.1,14.6]){
+            translate([2.9, y, -holeDepth]){
+                cylinder(h=6.4+holeDepth, r=2.5/2); //M2.5 holes
+                hexagon_prism(height = holeDepth-nutSpacing, radius = 2.55);
+            }
+        }
+    }
 }
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