A bit more watching and I have realized the loading station Decider and Arithmetic combinators are evaluating the input (call of +1 on the network) and its output (Reply of -1 on the network) together. It's currently set up to evaluate "call for product" and "Train Count > 0", and it's output keeps ...

Quick follow up. Having watched the system for a load of plastic, I observed the network signal quickly flickering from "Plastic 1" to [Nothing} at what appeared to be every game tick. I am guessing that one (or both) of the associated stations are doing updates and checks as their inventory counts ...

So I'm trying a relatively simple setup where:

Supply stations are disabled if less than one trainload is available
Requester stations are disabled if they hold more than one trainload

Each requester station gets one Decider Combinator. Input is from the chests, also connects to station (so it can ...

Following up, I have a question of my own. I want to mimic the LTN behavior of "when station drops below a minimum threshold, dispatch a train to bring more", though I am having a bit of difficulty grasping how to do this successfully. I had a little difficulty with the refueling interrupt but got ...