This https://www.largeformatphotography.info/tachihara.html article says that the 4x5 Tachi's minimum extension is 75 mm. OP, please measure your camera to check. If correct, you'll need a board recessed at least ~ 8 mm.
This https://www.largeformatphotography.info/tachihara.html article says that the 4x5 Tachi's minimum extension is 75 mm. OP, please measure your camera to check. If correct, you'll need a board recessed at least ~ 8 mm.