hi, Iv just bought a irc el-gato and i cant get it off my rim iv tried every thing, and iv snapped 2 screw drivers.. The rim is a mavic d521 I need it off cos iv got a puncture, Iv also tried heating the rim with a blow tourch, but still didnt work. I havn't been ridin very long is there something i dont no. Help me please Thank luv bobby