Simple train requestor/provider/depot setup?

[vvildfire]

Hi all,

I have never built a dynamic train system before or done much work with circuits, mostly because it seemed like a huge and complex hassle that I didn't have enough reason to get into previously, but Space Age has given me a reason to set up an actual train system for mass material distribution while I'm off-planet, and the 2.0 update seems to have added a bunch of useful tools that make controlling trains simpler, so I want to try my hand at it.

I did a bit of browsing on the forum and found these threads on managing the new system and setting up a dynamic requestor system, but each of the systems mentioned in these threads admits what (to my eyes) look like core flaws and are technical enough that I wouldn't even begin to understand how to go about addressing those. Does anyone have any simpler guides/tutorials for setting up a basic, scalable dynamic requestor they could link me to? Ideally, the system would be able to handle numerous provider and requestor stations each of several different materials on a single network, with a small number of trains (fewer than the number of providers or requestors) servicing the whole system. I currently have a large bus system, and I'd like to have a bunch of mining/smelting outposts and a few trains that detect when a material in the bus is low and go fetch some from the various mining outposts.

Thanks! :D