I have searched high and low but I can't find a repair/parts manual for ProSD RB67 backs. It's just the backs I'm concerned with at the moment. Would anyone know where I might find one (assuming such a thing exists!).
While she shells are different, I wonder if the innards had a significant change? I know they re-shaped the backs and added light traps, but no idea if the inserts were redesigned? I've never checked to see if a Pro-S back fits into an SD shell, actually.