Just have to post this because I took massive amounts of psychic damage during the rebuilding process. I did a good job of taking off the old crimp rings but them marred them up badly when trying to reinstall using pliers and electrical tape, as is sometimes recommended here. Bought new rings from Yamiya but these were a little too large and left a gap around the edges. These were installed using a brass drift, and a piece of 4" plumbing material (rubber with a metal compression band thing) that almost worked! Finally got rings and new bezels from CB750faces.com and used a special jig that a friend made for me, using a screwdriver to bend the band back into place. The backs are the originals, rechromed at a local shop.
0/10 most painful process.
But they look nice!