Couple years of restoring and tearing down random SRB finds.
Built a up a decent collection of Thorp Ball diffs with most recent MIP addition.
I almost found a Nodis geared diff a while back. I lost the auction, just
@ Ferris The Nodis is a really rare differential, especially being UK based back in the day. I think there is only one TC member in all that has one in his showroom. I've been lucky with the more 'common' ones I found thus far.