Hi there, I know this is a common problem with older M645 cameras. I was wondering if anyone knew where I could find a DIY repair manual for fixing this issue? I'm getting about 12.5 to 13 frames per 120 roll right now, Big gaps occuring between frames. No overlaps just big spacing. I've heard some people say its the 120 insert, and others say its the winding mechanism and friction wheel. within the camera.

Basicly I'm just looking for any advice/direction. I'm pretty handy with camera repair but I've never dealt with the M645 before. the oficial mamiya repair manual seems a bit proprietary and hard to follow. I was hoping someone here would have some real life experience?

Any help is much appreciated!