My appologies, I didn't photo the procedure. IIRC, you must grind at the top and bottom of the feed side of the camera. There are "bumps" that limit the diameter of the film roll. I have since sold the camera, so there isn't any way to photo it and describe the process. Go slow, and take care not to take too much out at a time, and test fit often. When you are satisfied you have completed the job, some flat black paint is in order to finish properly. One other recommendation, do this somewhere dust and metal grindings dont pose any problems, and wear a dust mask and safety glasses.