screen_xbot = 67;
screen_sz = [ 45, 46 ];
+thumb_xbot = 90;
+thumb_dia = 25;
+
rail_ysz = 2.5;
rail_zsz = 2.5;
psz[2]-1 ])
cube(concat(screen_sz, [ thick[2]+2 ]));
+ hull(){
+ for (x=[ thumb_xbot+thumb_dia/2, psz[0]+10 ])
+ translate([ -x,
+ ym,
+ -thick[2]-1 ])
+ cylinder(r= thumb_dia/2,
+ h= thick[2] + 2,
+ $fn= 20);
+ }
+
mirror([1,0,0])
difference(){
cube(psz + [1,0,0]);