I was wonder if anybody has any experience using a Fuji GX 680 with a digital back. I've recently aquired a Sinar 54 and know that they offer a adapter for the Fuji. I'd like to be able to use the back on my Fuji. The primary reasons being the tilt and shift capabilities of the Fuji. I know that it's HUGE and clumsy as compared to say a Mamiya 645. Still, I have all the lenses and complete set-up for the 680 and like I said, the T/S ability is important to me shooting interiors.