I would like to make some modifications to the home made 4x5 camera I use which has the front standard and rails from a Crown Graphic. For my envisioned modification, I need a new rail assembly (rails and focusing mechanism, still mounted to the door). I often see smaller Graflex cameras for sale on ebay for parts, but I do not know if the Crown Graphic standard will fit on the rail assembly from one of the smaller cameras, say the 2 1/4 x 3 1/4. Does anyone know or can you point to specs somewhere that would say? Thanks.