but omit to tell you you have to shell out for a new wheel if they are damaged big £££££. sometimes if you change the wheels over the card pulls apart I just scrape the rest off and make new onesThanks. Searching suggests everyone uses some form of card from a cereal box.
Just struck me as odd you cant buy them, since the likes of Norton say they must be replaced when damaged etc.
fly press = 2.lb hammer and a block of wood