diff --git a/README.md b/README.md
new file mode 100644
index 0000000..7527b71
--- /dev/null
+++ b/README.md
@@ -0,0 +1,7 @@
+# Productivity module
+
+## Parts
+
+[pogo pin](https://www.digikey.fr/fr/products/detail/mill-max-manufacturing-corp/0965-0-15-20-80-14-11-0/2784013)
+[8mm led](https://www.digikey.fr/en/products/detail/kingbright/WP793ID/3084252)
+
diff --git a/module.scad b/module.scad
index 773f156..6516091 100644
--- a/module.scad
+++ b/module.scad
@@ -1,13 +1,14 @@
 include <BOSL2/std.scad>
 
 box_width=30;
-box_height=12;
-box_border_width=0.5;
+box_height=13;
+box_border_width=0.8;
 rounding_edge=1;
 screw_offset=2.7;
-box_hull=1.5;
+box_hull=1.2;
 
 led_diameter=8;
+led_length=11;
 led_margin=1.5;
 led_box_height=2.5;
 led_ring=0.5;
@@ -24,142 +25,262 @@ m2_head_diam=3.8;
 m2_head_height=1.4;
 m2_hole=2.1;
 
+screw_throught_plastic_diam=2.7;
+screw_throught_plastic_depth=3.2;
+pcb_pad=5;
+pcb_width=0.8;
+pcb_top_margin=2;
+pcb_gap=2.2;
+
 fn=64;
 
-module WireCache(wire_count){
+module 8mm_led(){
+    union(){
+        translate([0,0,led_length-led_diameter/2])
+            sphere(r=led_diameter/2,$fn=fn);
+        cylinder(h=led_length-led_diameter/2,r=led_diameter/2,$fn=fn);
+    };
+}
+
+module pcb_top(){
+
+    difference(){
+        union(){
+            
+            color("green")
+            translate([0,0,pcb_width/2])
+            cuboid([box_width-2*box_hull-0.1,box_width-2*box_hull-0.1,pcb_width], rounding=rounding_edge, edges = "Z",$fn=fn);
+        }
+        
+        union(){
+            translate([box_width/2-2*pcb_pad,-box_width/2+pcb_pad-1,-0.01])
+            cylinder(h=pcb_width+0.02,r=m2_hole/2,$fn=fn);
+            
+            translate([-box_width/2+2*pcb_pad,box_width/2-pcb_pad+1,-0.01])
+            cylinder(h=pcb_width+0.02,r=m2_hole/2,$fn=fn);
+        }
+    }
+    
+    rotate([0,0,45]){
+        translate([-led_diameter-2*led_ring,0,pcb_width])
+        8mm_led();
+        translate([0,0,pcb_width])
+        8mm_led();
+        translate([led_diameter+2*led_ring,0,pcb_width])
+        8mm_led();
+    }
+}
+
+module pcb_bottom(){
+
+    difference(){
+        union(){
+            
+            color("green")
+            translate([0,0,-pcb_width/2])
+            cuboid([box_width-2*box_hull-0.1,box_width-2*box_hull-0.1,pcb_width], rounding=rounding_edge, edges = "Z",$fn=fn);
+
+            color("gray")
+            translate([0,-1.75+box_width/2-box_hull,-pcb_width-1.65])
+            rotate([90,90,0])
+            cuboid([3.3,9,6.5], rounding=0.8, edges = "Z",$fn=fn);
+        }
+        
+        union(){
+            translate([-box_width/2+box_hull+pcb_pad/2,box_width/2-box_hull-pcb_pad/2,-pcb_width-0.01])
+            cylinder(h=pcb_width+0.02,r=m2_hole/2,$fn=fn);
+            
+            translate([box_width/2-box_hull-pcb_pad/2,-box_width/2+box_hull+pcb_pad/2,-pcb_width-0.01])
+            cylinder(h=pcb_width+0.02,r=m2_hole/2,$fn=fn);
+        }
+    }
+}
+
+
+module wire_cache(wire_count){
     difference(){
     cuboid([wire_count*wire_diam+2*wire_cache,wire_diam+2*wire_cache,wire_cache*2], rounding=wire_cache+wire_diam/2, edges = "Z",$fn=fn);
     cuboid([wire_count*wire_diam,wire_diam,wire_cache*2+0.1], rounding=wire_diam/2, edges = "Z",$fn=fn);
     };
 }
 
+module indicator(){
+    translate([0,0,led_box_height/2-rounding_edge/2])
+    cuboid([3*led_diameter+2*led_margin+6*led_ring,led_diameter+2*led_margin+2*led_ring,led_box_height+rounding_edge], rounding=rounding_edge,$fn=fn);
+    
+    rotate([90,0,0])
+    translate([wire_offset,wire_diam/2+wire_cache,led_diameter/2+led_margin+led_ring])
+    wire_cache(4);
+    
+    translate([-led_diameter-2*led_ring,0,led_box_height])
+    cylinder(h=led_ring,r=led_diameter/2+led_ring,$fn=fn);
+    
+    translate([0,0,led_box_height])
+    cylinder(h=led_ring,r=led_diameter/2+led_ring,$fn=fn);
+    
+    translate([led_diameter+2*led_ring,0,led_box_height])
+    cylinder(h=led_ring,r=led_diameter/2+led_ring,$fn=fn);
+}
 
-module Module(){
+module indicator_hole(){
+    translate([0,0,led_box_height/2-rounding_edge/2-box_hull])
+        cuboid([3*led_diameter+2*led_margin+6*led_ring-2*box_hull,led_diameter+2*led_margin+2*led_ring-2*box_hull,led_box_height+rounding_edge], rounding=rounding_edge, edges = "Z",$fn=fn);
+
+    rotate([90,0,0])
+    translate([wire_offset,wire_diam/2+wire_cache,led_diameter/2+led_margin+led_ring])
+    cuboid([4*wire_diam,wire_diam,5], rounding=wire_diam/2,$fn=fn);
+    
+    translate([-led_diameter-2*led_ring,0,0])
+        cylinder(h=led_box_height+led_ring+0.001,r=led_diameter/2,$fn=fn);
+    cylinder(h=led_box_height+led_ring+0.001,r=led_diameter/2,$fn=fn);
+    translate([led_diameter+2*led_ring,0,0])
+        cylinder(h=led_box_height+led_ring+0.001,r=led_diameter/2,$fn=fn);
+}
+
+module mounting_pad_top(){
+    for (r = [ 0 : 180 : 360 ])
+        rotate([0,0,r])
+            difference(){
+                translate([-box_width/2+box_hull+pcb_pad-0.5,box_width/2-box_hull-pcb_pad,pcb_top_margin+pcb_width])
+                cube([pcb_pad*2,pcb_pad,3]);
+            }
+}
+
+module mounting_pad_bottom(){
+    for (r = [ 90 : 180 : 360 ])
+        rotate([0,0,r])
+            difference(){
+                translate([-(-box_width/2+box_hull+pcb_pad),box_width/2-box_hull-pcb_pad,-pcb_gap-pcb_top_margin-pcb_width])
+                cube([pcb_pad,pcb_pad,4]);
+            }
+}
+
+module mounting_hole_top(){
+    for (r = [ 0 : 180 : 360 ])
+        rotate([0,0,r])
+            translate([-box_width/2+2*pcb_pad,box_width/2-pcb_pad+1,pcb_top_margin+pcb_width-0.01])
+                cylinder(h=screw_throught_plastic_depth,r=screw_throught_plastic_diam/2,$fn=fn);
+}
+
+module mounting_hole_bottom(){
+    for (r = [ 90 : 180 : 360 ])
+        rotate([0,0,r])
+            translate([-(-box_width/2+box_hull+pcb_pad/2),box_width/2-box_hull-pcb_pad/2,-pcb_gap+pcb_top_margin-pcb_width-screw_throught_plastic_depth])
+                cylinder(h=screw_throught_plastic_depth+0.01,r=screw_throught_plastic_diam/2,$fn=fn);
+}
+
+module box_eyelet_hole(){
+    for (r = [ 0 : 90 : 360 ]){
+        rotate([0,0,r]){
+            offset_x = box_width/2-(1.5*rounding_edge+m14_head/2+box_border_width);
+            offset_y = -box_width/2-box_border_width;
+            translate([offset_x,offset_y,0])
+                cuboid([m14_head+box_border_width,m14_head+box_border_width,6], rounding=m14_head/2+box_border_width/2, $fn=fn);
+            
+            translate([-offset_x,offset_y,0])
+                cuboid([m14_head+box_border_width,m14_head+box_border_width,6], rounding=m14_head/2+box_border_width/2, $fn=fn);
+        }
+    }
+}
+
+module box_top_hole(){
+    for (r = [ 0 : 90 : 360 ]){
+        rotate([0,0,r]){
+            translate([box_width/2-screw_offset,box_width/2-screw_offset,box_height/2])
+                cylinder(h=m2_head_height,r=m2_head_diam/2,center=true,$fn=fn);
+            translate([box_width/2-screw_offset,box_width/2-screw_offset,box_height/2])
+                cylinder(h=5,r=m2_hole/2,center=true,$fn=fn);
+        }
+    }
+}
+
+module box_eyelet(){
+    difference(){
+        union(){
+            translate([0,0,-box_border_width])
+                cylinder(h=box_border_width,r=m14_head/2+box_border_width,$fn=fn);
+            cylinder(h=box_border_width,r=m14_head/2+box_border_width/2,$fn=fn);
+        }
+        translate([0,0,-box_border_width-0.1])
+            cylinder(h=3*box_border_width-0.1,r=m14_hole/2,$fn=fn);
+    }
+}
+
+module box(){
+    difference(){
+        union(){
+            cuboid([box_width,box_width,box_height], rounding=rounding_edge,$fn=fn);
+            
+            translate([0,0,-box_border_width/2])
+                cuboid([box_width+2*box_border_width,box_width+2*box_border_width,box_border_width], rounding=rounding_edge+box_border_width, edges = "Z",$fn=fn);
+        }
+        union(){
+            box_eyelet_hole();
+            box_top_hole();
+            cuboid([box_width-2*box_hull,box_width-2*box_hull,box_height-2*box_hull], rounding=rounding_edge, edges = "Z",$fn=fn);
+        }
+    }
+    
+    for (r = [ 0 : 90 : 360 ]){
+        rotate([0,0,r]){
+            offset_x=box_width/2-(1.5*rounding_edge+m14_head/2+box_border_width);
+            offset_y=-box_width/2-box_border_width;
+            
+            translate([offset_x,offset_y,0])
+            box_eyelet();
+            
+            translate([-offset_x,offset_y,0])
+            box_eyelet();
+        }
+    }
+}
+
+module productivity_module(){
+    
+    color("red")
     difference(){
         union() {
-    color("red"){
-        
-        difference(){
-            union(){
-                cuboid([box_width,box_width,box_height], rounding=rounding_edge,$fn=fn);
-                
-                translate([0,0,-box_border_width/2])
-                    cuboid([box_width+2*box_border_width,box_width+2*box_border_width,box_border_width], rounding=rounding_edge+box_border_width, edges = "Z",$fn=fn);
-            }
-            union(){
-                for (r = [ 0 : 90 : 360 ]){
-                    rotate([0,0,r]){
-                        translate([box_width/2-(1.5*rounding_edge+m14_head/2+box_border_width),-box_width/2-box_border_width,0])
-                            cuboid([m14_head+box_border_width,m14_head+box_border_width,6], rounding=m14_head/2+box_border_width/2, $fn=fn);
-                        translate([-box_width/2+(1.5*rounding_edge+m14_head/2+box_border_width),-box_width/2-box_border_width,0])
-                            cuboid([m14_head+box_border_width,m14_head+box_border_width,6], rounding=m14_head/2+box_border_width/2, $fn=fn);
-                        
-                        translate([box_width/2-screw_offset,box_width/2-screw_offset,box_height/2])
-                            cylinder(h=m2_head_height,r=m2_head_diam/2,center=true,$fn=fn);
-                        translate([box_width/2-screw_offset,box_width/2-screw_offset,box_height/2])
-                            cylinder(h=5,r=m2_hole/2,center=true,$fn=fn);
-                    }
-                }
-                cuboid([box_width-2*box_hull,box_width-2*box_hull,box_height-2*box_hull], rounding=rounding_edge, edges = "Z",$fn=fn);
-            }
-        }
-        
-        for (r = [ 0 : 90 : 360 ]){
-            rotate([0,0,r]){
-                
-                difference(){
-                    union(){
-                        translate([box_width/2-(1.5*rounding_edge+m14_head/2+box_border_width),-box_width/2-box_border_width,-box_border_width])
-                            cylinder(h=box_border_width,r=m14_head/2+box_border_width,$fn=fn);
-                        translate([box_width/2-(1.5*rounding_edge+m14_head/2+box_border_width),-box_width/2-box_border_width,0])
-                            cylinder(h=box_border_width,r=m14_head/2+box_border_width/2,$fn=fn);
-                    }
-                    translate([box_width/2-(1.5*rounding_edge+m14_head/2+box_border_width),-box_width/2-box_border_width,-box_border_width-0.1])
-                        cylinder(h=3*box_border_width-0.1,r=m14_hole/2,$fn=fn);
-                }
-                
-                difference(){
-                    union(){
-                        translate([-box_width/2+(1.5*rounding_edge+m14_head/2+box_border_width),-box_width/2-box_border_width,-box_border_width])
-                            cylinder(h=box_border_width,r=m14_head/2+box_border_width,$fn=fn);
-                        translate([-box_width/2+(1.5*rounding_edge+m14_head/2+box_border_width),-box_width/2-box_border_width,0])
-                            cylinder(h=box_border_width,r=m14_head/2+box_border_width/2,$fn=fn);
-                    }
-                    translate([-box_width/2+(1.5*rounding_edge+m14_head/2+box_border_width),-box_width/2-box_border_width,-box_border_width-0.1])
-                        cylinder(h=3*box_border_width-0.1,r=m14_hole/2,$fn=fn);
-                }
-            }
-        }
+            box();
+            mounting_pad_top();
+            mounting_pad_bottom();
 
-        rotate([90,0,90])
-        translate([0,wire_height,box_width/2])
-        WireCache(4);
+            rotate([90,0,90])
+            translate([0,wire_height,box_width/2])
+            wire_cache(4);
         
-    }
-
-    rotate([0,0,45]){
-        translate([0,0,box_height/2]){
+            rotate([0,0,45])
+            translate([0,0,box_height/2])
+            indicator();
             
-            color("red")
-            translate([0,0,led_box_height/2-rounding_edge/2])
-            cuboid([3*led_diameter+2*led_margin+6*led_ring,led_diameter+2*led_margin+2*led_ring,led_box_height+rounding_edge], rounding=rounding_edge,$fn=fn);
-            
-            
-            color("red")
-            rotate([90,0,0])
-            translate([wire_offset,wire_diam/2+wire_cache,led_diameter/2+led_margin+led_ring])
-            WireCache(4);
-            
-            color("red")
-            translate([-led_diameter-2*led_ring,0,led_box_height])
-            cylinder(h=led_ring,r=led_diameter/2+led_ring,$fn=fn);
-            color("red")
-            translate([0,0,led_box_height])
-            cylinder(h=led_ring,r=led_diameter/2+led_ring,$fn=fn);
-            color("red")
-            translate([led_diameter+2*led_ring,0,led_box_height])
-            cylinder(h=led_ring,r=led_diameter/2+led_ring,$fn=fn);
-            
-            /*
-            translate([-led_diameter-2*led_ring,0,led_box_height+led_ring/2])
-                sphere(led_diameter/2,$fn=fn);
-            translate([0,0,led_box_height+led_ring/2])
-                sphere(led_diameter/2,$fn=fn);
-            translate([led_diameter+2*led_ring,0,led_box_height+led_ring/2])
-                sphere(led_diameter/2,$fn=fn);
-            */
         }
-    }
-    }
-    union(){
-        rotate([0,0,45]){
-            translate([0,0,box_height/2]){
-                union(){
-                    translate([0,0,led_box_height/2-rounding_edge/2-box_hull])
-                        cuboid([3*led_diameter+2*led_margin+6*led_ring-2*box_hull,led_diameter+2*led_margin+2*led_ring-2*box_hull,led_box_height+rounding_edge], rounding=rounding_edge, edges = "Z",$fn=fn);
-                
-                    rotate([90,0,0])
-                    translate([wire_offset,wire_diam/2+wire_cache,led_diameter/2+led_margin+led_ring])
-                    cuboid([4*wire_diam,wire_diam,5], rounding=wire_diam/2,$fn=fn);
-                    
-                    translate([-led_diameter-2*led_ring,0,0])
-                        cylinder(h=led_box_height+led_ring+0.001,r=led_diameter/2,$fn=fn);
-                    cylinder(h=led_box_height+led_ring+0.001,r=led_diameter/2,$fn=fn);
-                    translate([led_diameter+2*led_ring,0,0])
-                        cylinder(h=led_box_height+led_ring+0.001,r=led_diameter/2,$fn=fn);
-                }
-            }
+        union(){
+            mounting_hole_top();
+            mounting_hole_bottom();
+            
+            rotate([0,0,45])
+            translate([0,0,box_height/2])
+            indicator_hole();
+        
+            rotate([90,0,90])
+            translate([0,wire_height,box_width/2])
+            cuboid([4*wire_diam,wire_diam,5], rounding=wire_diam/2, edges = "Z",$fn=fn);
+            
+            translate([0,-1.75+box_width/2-box_hull+0.5,-pcb_gap+pcb_top_margin-pcb_width-1.65])
+            rotate([90,90,0])
+            cuboid([3.5,9.2,6.5], rounding=0.8, edges = "Z",$fn=fn);
         }
-    
-        rotate([90,0,90])
-        translate([0,wire_height,box_width/2])
-    cuboid([4*wire_diam,wire_diam,5], rounding=wire_diam/2, edges = "Z",$fn=fn);
-    }
     }
 }
 
+translate([0,0,pcb_top_margin])
+    pcb_top();
+
+translate([0,0,-pcb_gap+pcb_top_margin])
+    pcb_bottom();
+
 difference(){
-    Module();
-    //translate([0,0,box_height-0.001])
+    //productivity_module();
+    //translate([0,0,(box_height-0.001)])
     //    cube([1.5*box_width,1.5*box_width,2*box_height],center=true);
 }
+