Im most likely going to be switching to associated soon, and will be getting the b4.1 wc, So far on my list im getting the avid steering assembly, avid bearings, ceramic diff balls, I want to do the bb spring conversion, and ive searched and I am confused on the things needed, does anybody have a link or part numbers needed for the conversion? Is there anything else that is really a good and a big improving upgrade that I should also get? Thanks.