As far as removing the transformers I found a post Jeff made a while back on the Clayman sound sticky.
"Take an SM57, unscrew at the middle 'joint' - you have two parts, the 'shaft' and the 'capsule' (note that I'm not calling it the 'head' because I'm not in the mood for cock jokes), joined now only by two wires. Snip the wires on the capsule end. There's a little screw near the narrow end of the shaft - screwing it in will allow you to remove the XLR plug from the body. That will now be connected to the capsule by two wires - snip those at the plug end. Boil the body (yes, boil in a pot of water) for about ten to fifteen minutes - not in a microwave, as that'll fuck with the transformer, which is somewhat handy to have around - and a bunch of hot glue in the shaft will soften, allowing you to pull out a gunky mess of nonsense that happens to contain the transformer. Remove this, and take two pieces of spare wire and hook the XLR plug back to the capsule, and assemble.
Pictures at some point... really, I'll get to it...
Jeff"
Sounds like something I don't want to do to a microphone Ha.