Hi, Gerald. The string connected meter in the SRT is actually a pretty long-lasting design. If your second shutter curtain ever gets "lazy" (which will cause your mirror to hang up at slow speeds), please let me know. I have written two annotated jpeg files which show where to put the single dot of oil to remedy this. I also have written a file showing how to replace the light seals in the SRT series, and will gladly send that to anyone who wants it. Nice cameras. I still use my SRT Super frequently. By the way, Zenit used a piece of string to pull the mirror up and out of the way in their first SLR models, and it is still working in most of the ones I've seen...think it was wound of yak hair, though.