Thanks for the links. I had found links of people using stationary wagons as chests, but hadn't found anyone using the wagons as one continuous belt, or using trains to fill assemblers directly.

I couldn't find anything on the idea of just using long train stations with assemblers next to them as a factory. Does anyone have an idea of how well it would work or any advice on the design before I start it: would it cost too much to set up? would it lower UPS more or less than a bot-based ...