Compact and UPS-friendly 1x1 loaders. Works with train cargo wagons, circuits, filters, and modded belts from Bob's, Krastorio, FactorioExtended Plus, Space Exploration, and Ultimate Belts.
It's considerably more tricky than the vanilla built-in loaders due to the need to implement custom GUI code and efficiently coordinate the state of multiple entities. I'll work on filtering when I get some time.
