Looking for the service manual for RH-50 back. It's a 8,5x11"-format ring-bound document. Attempting a replacement of 70mm-spool rollers with those from a 6x7 back in order to use 120 film, as well as re-gearing for ~6 cm spacing, instead of original ~7 cm (actually closer to 8 cm). A scan will do just fine. Thanks.
Bookmarks