I've acquired a cheap SQA with a 220 back recently (subject to 14 day return which is getting close). I don't have any 200 film so put in a 120 film, the problem I appeared to have is that the winder seemed to wind on further between frames more than normal (compared to my ETR) and then went back to turning the normal amount (if that makes sense). I only appeared to get 11 images out of the film, haven't had a chance to develop it yet but need to before the end of the week. My query is this - is this likely to be the behaviour of a 120 film in a 220 back, or could there be a problem with the sprockets on the camera and/or back? I'm not so bothered about the back as they aren't that difficult to replace but don't want to keep the camera if it's likely to have a problem. If you simulate winding on with the multi-exposure lever on, it seems to work fine. Do I assume its the film in the back? Any comments/suggestions appreciated.