Quote Originally Posted by Yashinoff View Post
Do you have a sacrificial roll that you can wind all the way to the end with the camera back open to see what is happening? I had a camera that was tearing sprockets half way through the roll and it turned out the rewind knob was just too stiff. A tiny drop of oil solved it.
I did buy a few rolls of expired film for cheap and ran it through the camera both with the back open, and with the lens off so I could watch the shutter. Tried all the different speeds and didn't notice anything out of the ordinary. I might try it again a few times.