One question regarding looking for the benefits of the leaf shutter: I presume that the FP shutter still has to fire, so the question would be when? In a Hasselblad V, I believe that the blind shutter at the back opens when you pre-release the mirror, and closes when you release the shutter button, but it is relatively light weight, and would not, I think, have the kick of the Mamiya/Phase's shutter. In other words, putting a leaf shutter lens on a FP shutter camera doesn't turn it into a leaf shutter camera like a V, so the advantage of the leaf shutter lens would be much more for flash sync than for vibration reduction?