The WRC-400 Repro version comes with a special holder for the Rodenstock or Schneider USB controller. This unit can be mounted on one of the 4 sides by choice.
The rear frame of the WRC-400 has a 40mm parallel shift (20mm each way) and the orientation of this is by choice left-right or front-rear.
Positioning left-right orientation allows you to stitch images of subjects that are larger than the capture area of the sensor can reproduce at a given resolution.
Positioning front-rear orientation allows you to offset the camera position from the center of the subject, or to fine position the capture area without touching the subject.
Lenses with focal lengths over 80mm can also be delivered with a Helical focussing mount with a travel distance of 25mm, which allows for a much broader enlargement range.