Finally got around to installing the 130i rear hub conversion.
The TL;DR: if you have a 128i and want the 135i rear brakes, just get the rear hubs and axles from a pre-LCI automatic 135i (with a 188 diff). They're a direct bolt-in, parking brakes and all. I went a little further and cleaned everything up and converted to the narrow hubs (i.e. 130i).
I'll get some exterior shots after I clean up the gunk from the rotor coating wearing off.
