"He who marches out of step hears another drum." ~ Ken Kesey
What Steve said.Ganging images on screens saves us about 2-3 hours of labor time per week, so it's non negotiable at our shop. The only times I don't gang them is if one of the images is too long or we simply don't have enough film ready for exposure. I think I would do it if we were a smaller shop too, nothing bad has ever come to us by ganging. Every time you do it, it's one less screen you have to clean, coat, expose and tape.