Hi, i am new to this site. I have a Duratrax Maximum ST. I recently purchased an OS .18 CV_RX (S) w/ 11j Rotary Carb. My friend told me that this will not fir into my truck... and that i need a new crankshaft. I just got it in the mail from towerhobbies and already opened it. IS THERE any way to make this fir in my car instead of buying a new crankshaft or sending it back?