I just developed my first roll of 35mm and the pictures turned out really nice! I thought for sure I would eff it up somehow. Anyway I have a question: my negatives sort of curl or develop a curve. Not curling back up like how it is wound in the film cartridge (I used weighted film clips to make sure it dries straight that way), but the other way, like how measuring tape looks, so it's straight but not flat. Is that a known issue with a known fix? Maybe I used the fixer for too long or something?