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.
I was using the miniloader mod with the Factorio-Extended mod and did some tests, it seems that the rapid miniloader mk2's throughput is not in full capacity. It jumps between 4200 and 4400, but not reaching 4500.