I have a spinner,use 3000 gritwet,drypaper,polish with storm exxtra shine followed by UFO.Bowled state at 42 ft and was ok starting with brunswick nexxus and transitioned into a lane 1 g force pearl.At our local IMO AMF?Bowlmor/Brunswick running 31 ft,want to guess?Blue dot straight up 10. with 42 ft im at 14.75 mph,31ft 11.29 with about 300-350 revs.Mr stroker can but hook in the box,I can buy urethane or plastic.BTW polishes have no grit,only compounds