Working with a local school I noticed they like to hang posters from the tables but have no good way of attaching. Tape and blue tack always fail. So I combined the excellent picnic table clip with the excellent revised wall mount clip, and shortened the picnic table clip for 1" thick tables.

Made the changes in the slicer and exported the STL; the results leave some rough edges and it shows. Might make a better model in the future.