Any haselblad ixpress and hasselblad CF back will fit to all those camera's. You only have to change adapterplates, something that takes 2 minutes. Ni hassle with infinity problems, chunky release cables, time lapse between pushing the button and the actual taking of the picture.
It works jus fine and keeps working.
i have and had a huge collection of camera's, from the H3d to the rolleiflex SL66, actually i think it is the only digital SL66 existing...mamiya RZ, 645pro, 645super ,contax 645, hasselblad v, rollei 6001/3/8, H1, H2, sinar P2, Rollei x-act, Kiev 88..... and all these camera's work perfect with all my ixpress backs ( the h3d only with the h3back). I think a lot of people forget about the hasselblad/imacon back's when looking for a back but you really better take a look at them.