How come it seems like every negative I want to print is on the end of the strip? I cut my film in strips of six, so the "keepers" have a one-in-three chance of being either the first or last frame of any given strip. It's so annoying. The same thing has been happening with my slide copying experiments: I don't mount my slides; instead, I cut them in strips of six slides per strip. When I want to copy either the first or last frame on a strip, it's much harder to keep the film lined up and flat. How does one combat this problem? Is it worth it to cut the keepers off of the strip and store them separately? Do glass holders help keep strips of film from trying to fall out of the holder and getting crooked?