It's really simple. If I want to set up a 50 inch roller transport system I can have one for the asking.
Lots to go wrong. With a basic drum and drive gearmotor, there's very little that can't be easily
fixed. The water tempering bath is on the side. My first really good drum and thermal regulator system was designed by a guy name David Seriqui. But he also marketed a multi-trough system for
b&w mural paper like you use, but with a chain-driven external roller transport, either hand or gearmotor cranked.