This Matt Denton has some good craic about Fed 2s. Most of the links in it are dead, but not his tutorial on how to disassemble and regrease an Industar lens.
And this site by Stephen Rothery is a mine of information.
I'm going to be home for a holiday in a few weeks, and, inshallah, I'll have a Fed 2 and a Jupiter or Industar lens waiting for me - there's loads of them on eBay. Funny how things happened: the Chinon went tits up, and I lost my interest in Leicas all in the space of a day or so. The daft things you do when there are no pubs to go to, eh?