Using the grub and set screws I am unable to center the OAG image in the camera's field. (Yes, I know the camera sensor is bigger than the prism). It appears the culprit is slop in the focuser orifice that fits over the top of the oval tube that holds the prism because when the grub screw is tightened the whole OAG tilts.
Is it possible reorient the prism so the light is centered when the OAG is tight (albeit crooked)?