Ralph- I don't know why I got so worried about those seals. The repair man said that an FE back he had didn't have them. I have just got a bit perfectionist about the light seals, I think, and I don't know why. I have never had a camera with a light leak! I think I just wanted a nice FM as I liked them when I was younger but they were too dear. This camera body has cost me £70 including the purchase price but at least it is all in one piece now (famous last words)! I probably could have got a good one in the first place for less. i probably would have sent it back if I had known earlier but I have had it just a bit too long now. It is a risk buying cameras on eBay. It is a punt unless the seller points out that it has had a CLA.
I expect that the repair man was talking about intense professional use when he mentioned the shutter problems rather than normal picture taking. I read an article about a Fleet Street photographer and he said they used FMs ( I mean before the other FM2 was brought out, not because it was better). I was surprised because I thought it was more of a high end amateur camera. I think the FM2 is probably a better camera apart from the fixed aperture "prong". I don't know why they dropped the ability to use the older lenses.
Dave