//5m telescopic rod holder //JP Hare, 3rd Feb 2023 difference () { cube([50,40,25]); //rod hole translate ([25,60,25/2]) rotate ([90,0,0]) cylinder (h=80, r=17/2, $fn=60); //bolt hole I translate ([5,20,-1]) rotate ([0,0,0]) cylinder (h=30, r=4.1/2, $fn=60); //bolt hole II translate ([45,20,-1]) rotate ([0,0,0]) cylinder (h=30, r=4.1/2, $fn=60); }