This is a FreeCAD version from https://www.multiboard.io/ designed by Jonathan from Keep Making on YouTube. Check his incredible work here and here.
You will need a Lattice2 workbench addon in FreeCAD.
For print instruction check the knowledge-hub.
The author remixed this model.
Maybe not all dimensions are spot on, especially for threads. I printed the original bolts from https://www.multiboard.io/ and tried out with the remixed baseplate. It worked.