drive shaft - my experience
I also have a drive shaft modified by Munich's. When I got it back the UJs had been retained by a washer welded in place. This increased the dimensions of the joint so much it wouldn't pass down the paralever housing. This required grinding the excess metal away until it would fit. After 2 years operation I removed it for regreasing and found the gb end nipple had come out and was in the housing. I think it had just vibrated out (the thread was undamaged) but I took it in to Munichs who said it was OK so I put it back. I guess it wouldn't hurt to leave them out until the next service provided you can find a suitable blank. I grease mine (and the wheel bearings) with a marine grease in case of water crossings. Next time I have it out, I must try and find someone to check the balance.
Tim ('91 R100GSPD)
The only baggage you carry should be in the panniers