I have a chronic film slippage problem on my OM1n body. A while back I took it to a couple of technicians who could not find anything wrong with the camera. The problem: I load Fuji Provia or Velvia film; shoot it slowly over a few weeks, even months and often by exposure # 20 something, it starts to slip. The last time this occurred, I ended up ripping the film in half trying to tighten it up so the advancement teeth would catch. I always tighten up my film as I load it. I suspect the film is loosening up as it lays around for a while and then a bumpy road is accentuating that problem. Am I doing something wrong? These problems coincidentally occurred when I switched over from Kodachrome to Fuji professional film a few years ago. Should I simply switch out the film advancement mechanism even though nobody can find anything wrong with it? regards -Erik