Needed a simple Gridfinity baseplate for a wire rack. Uses the intersection of a side and one wire, so will probably work on the ends or front of the rack, depending on wire orientation. Shown with and without a bin container. I glued my bin to the base, but magnets will also work.

All credit for the Gridfinity system goes to Zack Freedman, the cyborg. https://thangs.com/designer/ZackFreedman