I recently picked up a Hasselblad 500ELM in pretty nice shape, though it's jammed. I disassembled the camera a few times, and finally figured out the likely issue. For whatever reason, when you fire the camera, it jams mid-firing sequence, it goes far enough for the mirror to flip up, but stops just short of the lens' shutter fully closing before the exposure, and before the rear doors open. Does anyone know how to fix this issue? At one point I had removed the internals from the camera's shell, but couldn't find a way to remove the large gear that couples from the motor drive to the film advance gear. Anyone have any advice? A repair manual would be incredibly helpful, I did find a 555ELD repair manual, and a 500CM manual, but both cameras have enough differences from the 500ELM that it was only partially helpful. Any help would be greatly appreciated.