hey everybody well im new to this forum and i also have an hpi MT2 .18ss, but right now im having trouble trying to build the diffs and to shim them correctly, and i was wondering if anyone could help me out on giving me advice on building them, because this is the first time i tried building diferentials before.

and if anyone could let me know on a good engine to repalce the stock .18ss and a good pipe also.