ok hear is what i have,i got the .21 coverted tmaxx and it has monster gt clutch bell and spur gear on it,i want to put just the tmaxx spur on it but i do not know which clutch bell to buy,because the stock tmaxx clutch will not fit onto a .21,if anybody has got any clue on what clutch bell to buy please lewt me know,thanks.the reason i am wanting to do this is because the mgt gears do not have a big enough spur to run so it is like i am trying to do speed runs with it,lol and i want it to have alot of bottom end.