--- /dev/null
+translate([40,0,0]) difference() {
+cube([30,20,10]);
+translate([15,10,10]) rotate([90,0]) cylinder(15,5,5);
+ translate([5,10,-5]) cylinder(20,2,2);
+ translate([25,10,-5]) cylinder(20,2,2);
+}
+
+translate([40,-30,0]) difference() {
+cube([30,20,10]);
+translate([15,10,10]) rotate([90,0]) cylinder(15,5,5);
+ translate([5,10,-5]) cylinder(20,2,2);
+ translate([25,10,-5]) cylinder(20,2,2);
+}
+
+difference() {
+cube([30,20,10]);
+translate([-1,5,5]) cube([40,10,7]);
+ translate([5,10,-5]) cylinder(20,2,2);
+ translate([25,10,-5]) cylinder(20,2,2);
+}
\ No newline at end of file