Meissner body with support structure

Printing a [Meissner body](https://en.wikipedia.org/wiki/Reuleaux_tetrahedron#Meissner_bodies) in one piece requires some support material. I didn't like the support structure generated by the slicer software. So I created my own to print the Meissner body much nicer and to reduce rework. After printing you simply need to cut of the support structure and sand the edges with a file.

The edge length of the basic tetrahedron is 35mm. I attached my FreeCAD file also.