"He who marches out of step hears another drum." ~ Ken Kesey
Not sure what you mean but images are ganged up in the computer, then sent to the LTS, thus perfectly burned in register. The SAATI uses spring loaded pins to lock them in
It's not rocket science.
Imagine spending $100k+ on a laser and then being like I wanna save 40 cents in emulsion and use more tape so I can gang screens to "save money"