Gridfinity basic box with magnet holes and FreeCAD (RT)

Gridfinity Simple Box with magnet and screw holes improved based on Gridfinity Template (modified for mid-air holes). 

With parametric FreeCAD file. Works only with Realthunder's fork.

This is a reimplementation of Zack Freedman's Gridfinity basic box using FreeCAD (Realthunder's fork) instead of Fusion 360. See this video for further information about the Gridfinity project by Zack Freedman:

https://www.youtube.com/watch?v=ra_9zU-mnl8