Since the front and rear carriages are secured to the monorail bed,
the distance between them is NOT changed by the rotating camera
mount adjust knob.
c. When the camera cannot be centered horizontally with respect to the
subject because of an obstruction, centering of the subject on the ground
glass may be obtained by sliding the front or rear frame or both with
respect to its carriage. Slide the front or rear frame as follows:
(1) Loosen the respective slide and swing lock knob.
(2) Gently slide the front or rear frame to the right or left as
desired on its respective carriage.
(3) After the adjustment is made, tighten the respective slide and
swing lock knob.