$fn =32; module deckel(gap=0,cyl_h=2){ height = 0.5; dia1 = 1.7+gap; dia2 = 1.5+gap; h_offset = (height+cyl_h)/2; cube([25,20,height],true); translate([11.5,0,0])cube([5,5,height],true); translate([13+1,0,0])cylinder(h=height,d=5,center=true); translate([2-13+25,0,h_offset])cylinder(h=cyl_h,d=dia1,center=true); translate([2-13,-8.5,h_offset])cylinder(h=cyl_h,d=dia2,center=true); translate([2-13, 8.5,h_offset])cylinder(h=cyl_h,d=dia2,center=true); } deckel();