2 questions, first is more important, i just dropped my new os.18 cv-rx motor in and i put my spur on and it makes a grinding sound, when i took off the old motor it was all aligned properly then i put this one on and it went poof it broke the motor mount and stripped the spur, need it running by next weekend HELP!!!! get my paycheck this tmrw, and 2nd question is what rims/tyres are good for this 2 wd beast right now im running stock rims with pro-line masher 2k's on it HELP!!! please