SCAD design for a 3D printed Kong XL Holder. See https://ithoughthecamewithyou.com/post/3d-printing-a-kong-xl-holder for details.

kong-holder.scad

difference() {
    cube(size=[86,86,70]);
    translate([43,43,10]) {
        cylinder(h=35, d=60);
        translate([0,0,30]){
            cylinder(h=35, d=78);
        }
    }
    translate([-2,-2,10]) {
        cube(size=[40,40,70]);
    }
    translate([48,-2,10]) {
        cube(size=[40,40,70]);
    }
    translate([-2,48,10]) {
        cube(size=[40,40,70]);
    }
    translate([48,48,10]) {
        cube(size=[40,40,70]);
    }
}