Is it possible to print them all at once (on a roll) and then cut down? I would think this would keep it from becoming inconsistent.
I find all the errors to be vertical. The shorter the film is the better it prints, at least that's what I've found. Joining them all together seems like a bad idea because that "little bit off" you get between 2 films could be quite huge by film #8. I don't have an answer. Sometimes I have to print a film 3 times. Those 3 prints will be exactly the same or all a little bit different. One might line up with the black lines or be close enough, maybe none will. I'll post some pics next time I go through this.