Those'll work far better than those you linked from Ebay! I bought ofna diffs from a guy on UE for $80 - same ones UE includes in their 6 spyder Ultralights.
After you get diffs and pinions, find some shims and set them up right. If you've never done it, go over to UE and find their setup instructions for theirs - well documented, lots of pics, and easy to understand. Once you see these, you'll know what need to do for yours.
huh? the pics of the combo diffs are from ebay, yes. and those are the ones i got. i am confused, what are you saying here?
edit: i cant find that write up. link?
The diffs in the red alum cases from a while back (your ebay link in your posting #21) - just stock maxx diff parts assembled in a set of alum diff cases - the combo bulks you picked up will be much better than those, obviously.