This is directed to anyone with experience repairing stereo cameras obviously. The take up spool on my colorist II is loose and will not take up the film. I can't find any missing parts on the spindle or the spool, which are in excellent shape (I guess) but there does not seem to be a way to keep the reel from spinning freely either way. What could I be missing? I am unable to track down (so far) a repair manual.