diff --git a/servo_pusher/servo_enclosure.scad b/servo_pusher/servo_enclosure.scad
index 35d7db1..c8fd26c 100644
--- a/servo_pusher/servo_enclosure.scad
+++ b/servo_pusher/servo_enclosure.scad
@@ -28,6 +28,8 @@ module outer() {
     cylinder(r=40/2+wall_thickness,h=box_z);
     translate([gear_distance,0,0])    cylinder(r=40/2+wall_thickness,h=box_z);
     translate([0,-(40/2+wall_thickness),0])    cube([gear_distance,40+wall_thickness*2,box_z]);
+    fastening();
+    translate([gear_distance,0,0])mirror([1,0,0])fastening();
  }
  
 module inner() {
@@ -35,6 +37,7 @@ module inner() {
     translate([0,0,wall_thickness])    cylinder(r=40/2,h=box_z);
     translate([gear_distance,0,wall_thickness])    cylinder(r=40/2,h=box_z);
     translate([0,-(40/2),box_z-wall_thickness])    cube([gear_distance,40,5]);
+    fastening_cut();
 }
 
 module servo() {
@@ -87,7 +90,7 @@ module lid_screws() {
  }
  
  module rod() {
-     translate([20-7.5-16,-100,6+2.5+1.5+gear_thickness*2+1.5])    cube([12+0.8,173.2+0.4,5+0.4+3]);
+     translate([20-7.5-16,-100,6+2.5+1.5+gear_thickness*2+1.7])    cube([12+0.8,173.2+0.4,5+0.4+3]);
  }
  
  module lid() {
@@ -99,7 +102,7 @@ module lid_screws() {
             translate([0,-(40/2)+0.2,box_z-wall_thickness])    cube([gear_distance,40-0.4,wall_thickness]);    // mid
              translate([gear_distance,0,box_z-wall_thickness*2])    difference() {
                  cylinder(r=7,h=wall_thickness);    // bearing outer
-                 cylinder(r=5/2+0.2,h=wall_thickness*2);    // bearing inner
+                 cylinder(r=5/2+0.3,h=wall_thickness*2);    // bearing inner
              }
          }
         translate([gear_distance/2,40/2-2,box_z-1])    cylinder(r=inner_screw,h=3);
@@ -107,9 +110,33 @@ module lid_screws() {
 //        translate([-gear_distance/2-3,0,box_z-1])    cylinder(r=inner_screw,h=3);
 //        translate([gear_distance*1.5+3,0,box_z-1])    cylinder(r=inner_screw,h=3);
      }
-     translate([(20-7.5-16)-2,-(40/2)+2,box_z-wall_thickness-5])    cube([2,40-4,5+wall_thickness]);    // rod guide
+     translate([(20-7.5-16)-2+0.4,-(40/2)+2,box_z-wall_thickness-5])    cube([2,40-4,5+wall_thickness]);    // rod guide
+     difference() {
+     translate([gear_distance/2,0,box_z-wall_thickness])cube([79,7,wall_thickness],center=true);    // fastening
+         translate([gear_distance+40/2+4,0,box_z-2*wall_thickness]) cylinder(r=1.4,h=8);
+         translate([-40/2-4,0,box_z-2*wall_thickness]) cylinder(r=1.4,h=8);
+     }
  }
  
+module fastening() {
+    $fn=50;
+    translate([gear_distance+40/2,0,box_z-2*wall_thickness]) {
+        difference() {
+            minkowski() {
+                translate([0,-7/2+0.5,0])rotate([-90,0,0])linear_extrude(7-1)polygon(points=[[0,0],[6,0],[0,6]]);
+                cylinder(r=1,h=wall_thickness);
+            }
+            translate([4,0,-5])cylinder(r=1.2,h=8);
+            translate([4,0,-5.6])cylinder(r=2,h=4);
+        }
+    }
+}
+
+module fastening_cut() {
+    $fn = 50;
+    translate([-30,-4,box_z-wall_thickness])cube([90,8,5]);
+}
+ 
 difference() {
     union() {
         box();