Good stuff.
I've entirely dismantled a 25/C box I got for £10.50 recently. It's in great condition really apart from the fact that it's been sat in a barn gathering cobwebs for the last 15 years. If it wasn't for the dirt that had managed to get in to the casing, it wouldn't need refurbishing at all, but oh well. I'm currently trying to clean the casing, and what a pain of a job that is. The washer/de-greaser attachment for my air compressor just isn't cutting it, but I'll get there.
I was wondering whether you'd actually come up with a plan w/ regards to the bearing pre-load, and torqueing up that annoying stake nut on the differential shaft. I had to drift that nut around to get it off. I can't spend the £80 on the special socket in order to torque it up, so, I need 'a plan' too