ORIGINAL: rangerfredbob
if you broke one stock one, you'll break another.
I would suggest getting an aluminum diff cup with ring gear that has 3mm screws instead of the stock 2mm, Kimborough used to make one that was fairly cheap (like $20 for the cup and $10 for the ring gear) but that apparently isn't around anymore... I did a quick googlel search and found other options for around $45...
Yup.... aluminum diff cup and 3mm screws should do the trick. Here is what you need....
http://www.fastlanemachine.net/prodd...lm51000&cat=23 32 bucks for a modified ring gear and diff cup both modified to take 3mm screws.
I run this setup in my .28 picco powered maxx and have yet to have a problem.