Hello all, I was wondering if anyone has successfully modified a Polaroid 405 pack film back to work on a 3.25 x 4.25 camera. Or What are my other options for using a 3x4 camera? I picked this thing up at a flea market thinking it was a 4x5. I would be interested in getting a roll film holder for the camera, but I can't seem to find one for 3x4 anywhere. Do you think I should get a 2x3 roll film back & glue it on a larger frame? My Speed Graphic has the Graflock back.