Ive just rebuilt my diff after destroying it at the weekend. Things that I did differently;
1) I used Tamiya Hard Damper grease on the back of the diff plates to stop the plate from slipping (I always used this grease when building my TC Tamiya diffs to stop the plates slipping on the diff halves... got this tip of Hupo when he was driving for Tam a few years back).
2) I have used a whole world of black grease on the thrust, and then again a load of clear grease in the diff.
3) Ran the diff in at low speed (for around 5-8 mins) and slowly tightened it up till it was as tight
I have kept everything standard, so no ceramic balls! But after all that the diff feels good on the bench, but the test will be after the first practice on Sunday. Just thought I would share this and hope the info comes in handy... will report back after sunday to let you guys know if the diff held up better than before