“This is an improved Version of https://www.thingiverse.com/thing:3752530 with the main difference being, that it is uses M4 cylindrical head screws instead of countersunk M4 screws.
It has also the big addition, that it is adaptable to different PCB sizes. That is achieved through the spreadsheet functionality in freecad.
I made a few working examples fitting these PCBs (*https://amzn.to/2Z9HYOr).”