I only replaced the one joint at the firewall - it was almost completely seized. The upper joint leads a sheltered life and looked brand new; the lower joint had no play, although it isn't quite as smooth as the others it's easy to pull out when it eventually needs replacing.
I made a half hearted attempt at removing the bearing: the FSM differs from the actual part in that there is no snap ring holding the assembly together. I think the plastic O-ring is held in by friction and rust and I was pretty sure none of it would survive extraction. Since I didn't have spares I decided to leave it alone for now.
Those little bearing cups are delicate: when pressing the new ones in make sure any burrs and the dimples from staking are removed and the yoke holes are round.
hi mate did you have to re-stak? I was told to use a punch or the likes to keep them in? Cheers mate