Originally posted by dcshooter The only exception would be in certin older design SLRs with fixed focusing screens that require disassembly of the top of the camera to remove the screen.
That would include all of the film SLRs on my shelf as well as the OP's ME Super. Once the screen is out, the dish soap process your describe works well and is the method used by my local tech. As for the mirror...you and I may know the meaning of the words "light pressure", but based on the number of cameras with scratched mirrors I have seen and the difficulty sourcing replacements* ...
Depending on the availability of funds and the OP's desire to learn the inside of the camera, it is sort of a toss-up with an ME Super. I would probably do the CLA myself, but then again, I have operated on many cameras over the years.
Steve
* My Pentax SV had serious scratches on both the mirror and focus screen when I bought it. Eric was able to replace the mirror with one from a parts camera, but did not have a good focus screen.