I was looking through my top shelf and in amongst the elephant's graveyard of equipment, SLR/n, Mamiya twin, old nikons etc, (light meters!) I took out my very nice Fuji GW690III and thought, wouldn't it be nice if I could clip my Aptus to the back of this thing. It would take a very nice lens out of retirement and would be nice for a (bulky) rangefinder. Has anyone ever heard of a mechanical genius who could graft a Hasselblad V connector plate to the back of something like this. You would have to use a sync lead and it might be hard to position your eye at the rangefinder, but it might be worthwhile. You would have a MFDB file from a handheld camera with no mirror vibrations and relatively quiet operation. Framing would be the major difficulty but I'm sure you could rig a mask... come to think of it you could also use a sliding back....
Ros