I have a whole plate camera, one closer to that of the OP than the one Tin Can posted. It was made locally in Pakistan and uses the book form holders of which I have two. I took a shot in the dark and used a 2mm glass cut to size as a spacer in the holders for use with x-ray film. I not noticed an image shift even wide open, but then I also have nothing to compare it with or any experience with any other LF camera.

Was using it with a Carl Zeiss Jena 21cm/5.6 barrel lens and have just started to use a Fujinon 150/5.6 on it. The lens board measures 101mm x 114mm (4 x 4.5 inches roughly)