D1W=26;
D1L=34.5;
D1H=8;
Wall=2;
Clearance=0.2;
Lidnodge=1;
GPIOW=2.5;
GPIOL=21;
translate([0,0,0]){

    difference(){
            cube([D1W+(Wall*2),D1L+(Wall*2),D1H+Wall-0.1]);

            translate([Wall,Wall,Wall]){
                difference(){
                    cube([D1W,D1L,D1H]);
                //PCB Spacer
                translate([0,D1L-4.5,0]){
                    cube([D1W,4.5,2.4]);
                }
            }
            }
            //usb port
            translate([((D1W/2)-(7.5/2))+Wall,-1,Wall]){
                cube([7.5,Wall+1,3.0]);
            }
            //reset button
            translate([-1,Wall+2,Wall]){
                cube([Wall+1,2,1]);
            }
        }
    //lid
    difference(){
        union(){
            //lid
            translate([0,0,D1H+Wall]){
                cube([D1W+(Wall*2),D1L+(Wall*2),Wall-0.1]);
            
            //fit
            translate([0+Wall,0+Wall,-Lidnodge]){
                cube([D1W-Clearance,D1L-Clearance,Lidnodge]);
            }
        }
       }
       //GPIO ports
       //Left
       translate([Wall,6.2+Wall,(D1H+Wall)-Lidnodge]){
            cube([GPIOW,GPIOL,Wall+Lidnodge]);
       }
       //Right
       translate([D1W+Wall-GPIOW,6.2+Wall,(D1H+Wall)-Lidnodge]){
            cube([GPIOW,GPIOL,Wall+Lidnodge]);
           }
       }
   }