Wisner 4x4 and Zone VI 4x4 boards are pretty commonly usable on other cameras that take 4x4 wooden boards. I use a Wisner 4x4 on my 5x7 Deardorff, but a Deardorff board does not fit a Wisner camera or Zone VI camera, the rebate on the back of the board is narrower on the Deardorff.