Factorio - Smart/Balanced Multi Train Station Unloading (Very Easy to Build)
Blueprint String: https://pastebin.com/fAWR38Fx
Why this is useful: Normally if just set multiple train stations (with the same name) without this system, a train randomly selects a station, even if its already occupied, so you could potentially have 3 trains all waiting to go to one station while 3 other stations are available to unload your cargo. This system eliminates that problem by making sure the trains only visit stations that don't already have a train in station, they're other systems like mine, but I found them to be very complicated (with tutorials lasting over 20 minutes of intensive circuit network stuff). This tutorial here is a little less than 6 minutes and doesn't require much knowledge/usage of the circuit network.