I have a Cambo SC monorail 4"x5" camera and three wide angle/short focus lenses: a Schneider Super-Angulon 47mm (non-XL), a Nikkor SW 65mm, and a Wollensak 90mm. I have one recessed board and will be seeking to buy a couple of other boards, along with a bag bellows.
With the tripod mount between the standards (and the normal bellows attached), the closest the film and lens planes can be is 4" (101mm). Even with the 30mm recess of the lens board, this is not sufficient for the two shortest focal length lenses.
My question, however, is about moving the tripod mount either in front of the front standard or behind the rear standard so the lens film planes can be brought close enough together to focus these lenses. In general, is it better to mount the camera in front of the two standards or behind them? Or, does it not matter?