I'm starting this weekend thread with my experiments on the Polaroid Swinger 20. I managed to seal the back very efficiently, no light leaks. But to achieve that the gate where I pull the 120 backing paper out got very tight, so that in the end the paper snapped. I used a roll of Ilford Delta 3200 as the original Polaroid film was ISO 3200. Using the camera with flash at short range indoors I did get a few images, although somewhat underexposed. I had to crop this image due to some overlap on the film, but the real format is 6x7. I think the idea of advancing the film by pulling the backing paper is not feasible. I shall have to think of some advance mechanism, but that will take some engineering.