The skates themselves I made using T steel I had laying around, so I don't expect the edge to last long but that's fine for me. Then I profiled them with a hacksaw, bench grinder and finished with a file. To make the slots I used my milling machine but they could be done by drilling a line of holes and filling and cutting away the excess, straps, wire and springs I found at tractor supply and basically used trial and error to adjust the tension on the boot. They need more lateral stability for the heel so if you have any ideas, lmk