I have an old Argoflex E which I understand takes both 120 and 620 roll film. As I see it using 620 film is a bit pricey when I have the better option of 120. However the take up spool in the camera is a 620 spool. I understand that the only real difference is the diameter of the spool and that it is even possible to respool 120 film onto 620. I was going to try and find an discarded 120 spool but the only local lab doesn't think they have one and ebay charges more for one than I could buy a spare roll of 120 with film (funny ehh). I was wondering if it would just be possible to use the 620 take up spool but load 120 film in. Get it processed and request that they local lab returns the spool to me and then I will have both size take up spools. Would this work? My guess is that my biggest risk is a jam in the camera that causes me to open it to light and waste a spool of film and get my new spool that way. Any thoughts?