Neat find! I’ll be using some of these, especially Chris’s Camlock adapters which seem to be inspired-by/compatible-with @bitingmidge’s work.
https://www.printables.com/model/461256-shopvac-50mm-camlock-connectors-with-magnetic-catc
Jamie’s OpenScad based gridfinity generator, and interactive configuration tool got a prominent mention in one of Zack’s videos too.