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.
When using the upgrade planner on a bunch of mini loaders hooked up to wires, many of the wire connections are severed. Not all of them though. May be related to the order the bots build them in