I mean to do it un-powered. I am fairly certain I could recognize all our lego parts from a high-res scan with vision path, laser-cut a qr-code into each piece

I mean to do it un-powered. I am fairly certain I could recognize all our lego parts from a high-res scan with vision path, laser-cut a qr-code into each piece, and then build a camera-driven bit-pump, but ultimately .. while picking up pieces and putting them back in the box, I would have liked to just know how to produce an ultimate gravity-sieve variant of the solution wherein a form is composed of layers of sieve structures, pieces are poured in one end, out come each piece, sorted by size/type. I should probably pay more attention to mathblogs, I'm pretty sure there's a proper way to describe a gravity sieve for lego components.