IMHO this is the wrong way, gearings are unnecessary and a problem in the field. Also IMHO this is the kind of improvement that's good for the field:
Precise, compact, easy to deploy, refined and range finder capable. Single probem is $ for the later models.
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With no gearing, if you rest your hand on the frame and clamp with your fingers on the movement you have a totally precise adjustment, with some practice.
The real problem with movements in the field is tripod, after adjusting your movements you insert the film holder, tripod head can be "elastic", but it has to return to exactly the same direction after making force for inserting the holder, if not the plane of focus will move a lot. A good test is placing a laser toy pointer in the front standard to see if the camera returns to de same direction, or inserting-removing a holder and checking focus plane position again in the GG to see if it moved.
If no tilt-swing a change in the camera direction only provocates a change in the framing, but if a tilt-swing is there then also the plane of focus moves in the scene.
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