Deleted by author I got a couple 4 foot shelf brackets - the ones that you find inside bookcases, flat, about 1/2 to 3/4 wide with notches all the way up. I measured the diameter of various pails and buckets with a diameter close to what I wanted, but ended up using the diameter of the dryer door (24”). I drove a couple deck screws into my bench work to pry one end of the bracket into smooth 12 inch radius. You can use your hands if you’re strong enough. Keep checking against your chosen arc radius until you’re satisfied. I made a second jig with a 10 ½ inch radius for an inner track.