RE: .28 in a funfactor? oh dear....
With this mod the dremel has already come out. I am not worried about shaving the diff cup a little because it is twice the thickness of the MT2 diff cup.
This does require the use of a dremel or other similar tool because of the need to reshape and shorten the diff cup to fit.
Limiting the suspension is an option that I might have to do either with zip ties (thanks Scouser) or spacers in the shock bodies, but at 9$ for replacement cups I can play around with them and see what is best.
rolland