I have a laser engraver from Amazon (Nasum A5 Pro), that I wanted to anchor to the table to keep it in the same position every time I used it.  The style of the engraver is that there is a flat piece of metal perpendicular to the floor for each foot, so I just created a piece that screws to the table to constrain a corner/foot from moving outward, with the idea to use 4 (or at least 2) of them to fully constrain the position of the engraver.

It is parametric, so you can switch between left and right ("left" value is 1 or 0), as well as customize whatever other dimmensions you want.

I printed mine with PETG+, and have been pretty happy with it.  I snugged it up against the corners where I wanted it, marked the holes with a pen, then removed the engraver, drilled, replaced the engraver, replaced the PETG pieces, and used some #10x1" wood screws to attach it to the table.  I can't get the engraver to budge even a little by pushing on it with these on.