well got the drilling directly from morich it jus wouldnt push and rolled out early changed the surface to a polish and ball never found a roll. I believe with my high rev rate that I overpowered the ezrev core so that might have been an issue also. I tried it at all diff surfaces 4000 smooth 2000 smooth and anything that didnt have polish hooked and rolled out if it had polish the ball never found the rollwas a dud for me but might have been the wrong equipment for me. the wmb was the same way for me but I do miss my collosses supreame awsome ball