IMO the L version would be easier to handle if the pan control were at 90 degrees from the main control (like Linhof) instead of 45 degrees. (In image #7, you'd have to reach around 270 degrees, which is do-able, instead of 315 degrees)
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uh-ohhh, it is not apparent from any of the photos that the pan control is not 180 degrees (3 o'clock) from the drop notch (9 o'clock) but is at 4:30! In that case, the M10R configuration would put the head so tht (when oriented for portrait orientation to permit counterclockwise rotation of camera so its grip is up, not down) the drop notch at 9 o'clock, the main control is at 12 o'clock, and the pan control is at 1:30, which would seem to make that layout awkward because you have to reach around the large main knob with the left hand to somehow grasp the pan lock with the same hand!


