Hey guys i need a little help picking out a system for my b4.1.I was wondering since im wanting to run a 17.5 for stock spec can i use a tekin rs instead of the rs pro since im not running mod motors?My second question is what kind of gearing should i run?I run on a decent sized carpet track.Please let me know as im ready to buy to this stuff soon for the upcoming races.Thank you for any responses.