Yes, I am. It curls along the length of the film like long trough and a weight won't stop that. I don't have an operational darkroom yet so I am still scanninng. Newton rings are a big problem. A guy who used to run a lab around here said he used to always have a humidifier going and when people would bring film in for enlarging, it would sometimes take a couple days to get the film to relax and flatten out.