no credits because many people came up with this design independently
Loads items into shulker boxes at hopperspeed. Includes an SS3 item filter. 7x7 in size. Can very rarely lose a box when multiple slices trigger at timely intervals.
Two schematics are provided; one for 1.11+ that's one block higher and one for 1.13+ with two alternative ways to wire the box breaking. Both share the same features.