Was there ever an effort to use sprocket-less 35mm film stock to expand the exposable area of the film? It seems you could squeeze perhaps a 30mm X 45mm frame and devise some simple clip system to attach the film ala roll film on the take-up spool with the appropriate leader shape/design. I realize that this isn't going to happen at the dawn of the digital age but I don't recall reading or seeing anything in this regard from the past. I had an 828 many years back and that seemed to work nicely but didn't really take advantage of the extra area much. Were there any attempts at this?