Oh, so it's probably fixable, then? That's nice to hear.

Weird servo errors and screeching noises to seem to suggest a problem with lubrication (not surprising, given its age), so that's probably a good thing to check out before it gets damaged beyond repair. Maybe if you lubricate it properly, the servo errors will subside a bit? Maybe the cartridges themselves need lubricating??

Molten rubber could be causing a problem too. Particularly with the heads getting stuck to their rests.

Either way, it sounds like it's becoming quite a project.

c