The 90 on a 4x5 is really nice. A while back I had a 5x7 expander back for a Wista 4x5 and when I put my Fuji 90mm on the 5x7, it was beyond awesome. I had to play with the front standard to get it back far enough into the body so it could actually focus on infinity.

No front movements at all, but the depth of field was really deep.