.......well sorta. I saw the sled Spanx made and modeled mine after his, good idea I thought! I tested it out and it's a winner for me and cost about nothing to make. I made a brass pivot for the pin in the compass to turn on so it will stay straight and no wear to wollow out the hole. I put a pointer ( not pictured) off to the side to mark 90° so I should be good to go! Be well.......Jan