Just out of interest what is wrong with the reels ?
One of them, the 'bell housing' doesn't sit straight, pretty certain that's all one fixed unit. (the piece that you have take off to access the spool, which the pickup pins sit in). I've been watching eBay and looking online off and on for a few months for a replacement and not found one, so unless the threaded bit, which screws into the reel can be straightened, that's looking like a 'write-off'. Maybe this is called the winding cup!
The others (I've got 5 of them now), I think they are all OK, just want a good going over, but my thinking was to send them all somewhere with the instructions 'can you build me 3 decent reels' from them.
I've been sat on them for a number of months, but on Sunday I had a session on the Thames, and set up 2 waggler rods, each with 506 mk2s. One of them just feels rough and like it's going to seize on me at any time, I've already had one replaced under warranty, and after that session, it prompted me to get on with getting the mk1s into a serviceable state because I don't have a whole lot of confidence in the newer ones.