$fn=200; difference(){ //translate([0, 0, -2]) cube(size = [26,122,28], center = true); rotate([0,90,0]) translate([-16, 15, 16.5]) cylinder(h = 12, r = 12, center = true); rotate([0,90,0]) translate([-16, -15, 16.5]) cylinder(h = 12, r = 12, center = true); rotate([0,90,0]) translate([-16, 45, -16.5]) cylinder(h = 12, r = 12, center = true); rotate([0,90,0]) translate([-16, -45, -16.5]) cylinder(h = 12, r = 12, center = true); translate([0, -29.25, 2]) cube(size = [21.5,59.75,26], center = true); translate([0, 29.25, 16]) cube(size = [21.5,59.75,26], center = true); }