Without checking I would say that the 3m disc shafts are too big to fit a dremel. That being said I could be wrong. A good cordless drill would accept the shank though. I have never tried it on a drill however and would be surprised if the RPMs would be high enough to do much damage to those sticky ass bastard gaskets. If you have access to a compressor, a cheapo right angle grinder will be your best friend.
As for the clutch basket issue, I barked at it, looked at it some more, growled at it, drank a beer out of my water bowl, took a nap, then put it back together, checked the clearance and said #$%* it. It hasnt been making any noise since the rebuild. Its possible a bearing was worn enough to allow contact, but I could never find a worn bearing or anything else that would have caused the contact. Long story short I dont know the cause but it seems to have fixed itself, at least for now. I made sure all the bolts that hold the entire engine together were torqued to spec, its possible one of the screw/bolts that resides in the Neutral switch area was loose causing excessive play, but I could never prove it.
Good luck with your gaskets. If you try the drill or dremel method with those rolocs let us know the outcome.