It all went rather well... no large chunks in gearbox or diff, tho the diff was waay past-due for the change. The pinion seal leaks, but until just recently there were no crush-tubes to be had. Now I've got one and a seal, so the rearend will be coming out as soon as I can get this MGB done and "legal".
By regularly topping up the diff as it leaks you could say you're accomplishing an "extended fluid flush!" /ubbthreads/images/graemlins/devilgrin.gif
...always ~something~...