I have thought about building something similar, but the design would have the be quite different to make any sense. As that thing is huge.
But currently grafmatics & kinematics are enough for me. As those give similar usability to medium format (6-10 sheets), and that's the goal. It does not need to chew film, just bring the usability to the level of medium format.
And as the back is designed to be fast, its easy enough to go from holders to holder.
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