Quick question about ball diff on these x-cells. How tight should they be? I am running the electric version, but the only thing that really differs between nitro and elec is the size of the diff gear (i.e. there's enough space for one more ball bearing). Anyways, I have tried setting it and have melted two gears already. This last rebuild of all new parts, found a great video on how to do it. Followed the steps and at first it felt nice and smooth. After the little break in session, tightened it one last quarter turn and the diff won't grab..... Trying everywhere to get some info, but came here b/c people who know x-cells post here. Any insight would be great. For some reason I want to tighten it more but don't want to keep buy gears.....