[Biff]

The belting is your best bet. I would go with rough top, or a smoother finish, rather than wedge. Bring really good contact glue and small screws and a belt sander. Run the shooter at a reasonable speed use the belt sander (80 grit or so) to get the wheels closer to flat, glue and screw the belting on and you should get both, better grip and a larger wheel. Normal procedure to make the wheels flat is a metal lathe, we have done it that way I've never been present. I did try a router once.....Not a good idea. The carpet on the skyway wheels last year did a nice job on our non belted wheels that's why the sanding suggestion. BTW your wheels should be spinning about 1200 give or take a little 2400 would be the case if you were only driving one side and a had a non moving side.