Personally I would want a heavier camera for its stability, but yeah, the weight does take its toll, so all the more why pre-planning and discipline is crucial.
IIRC most shooters who need a LF platform and work in digital use medium format backs on a 45. The DSLR adapters for 45 impose too much restrictions to be really useful but that's mainly because of the tiny sensor size than anything else. I'm guessing a FF DSLR on a 45 with a long draw bellows would be great for ultra macro work though!
will it work? the lens not meant for 35mm mah.. the lines on the MTF chart not high enough for 35mm.. might be able to see all the lens "flaws" :bsmilie: