I want to adapt a lensboard from each of my cameras to take a smaller lensboard, so I can use my lenses on all my cameras. I am looking for the smaller lenboard that I mount my lenses to. This lensboard should be about 110mm square or less. It should also have a light trap in the back that will allow lenses with big rear elements to clear when I put the lensboard on the adapter board. For example, the Technika lensboards are good because they are small, but their circular light trap at the back of the board is too small. Lenses with large rear elements will not clear. Lensboards I am thinking of using include Canham, Arca Swiss 110mm, and Calumet 400 Series 4x4 . Do you have any suggestions?