Hey guys & gals, I realize this will be a hard one but I am looking for a parts and service manual for the MFB-1 film back for Contax 645. One of my backs recently lost one of the hinge pins for the back door on the back. From cursory examination it appears disassembly of most of the back will be required. I already had one of these repaired because of the crappy plastic rollers they used on the feed spool. (seen MANY that were broken like this) Really will be a unfortunate if I have to send this thing out for one tiny pin. Maybe I need to call TOCAD ?