I'm pretty sure the compressor itself is okay; clutch is slipping/squeeling mostly only at low rpms and around corners, and the system is still cooling really well. My main questions are:

1) do you have to evacuate the system and remove the whole compressor to do this job? If so, I may just go whole hog and get a new compressor anyway, since the car does have 250k on it and I can always keep the old one for rebuild/as a spare.

2) clutch removal using the bolt holes looks simple enough, but are there any issues with re-installation, especially regarding the shaft seals? I haven't been able to find any description of this job online, so I'm still uncertain about how the clutch attaches to the shaft and how everything goes together.

If anyone has any tips/advice from personal experience, it would be most helpful!