Parametric Tetrahedron Top for Delta 3D Printer

While designing my version of a Delta 3d Printer, I decided to put a tetrahedron on the top. While it was still clear in mind, I made 3 parametric versions of the corners so others can utilize this idea. The 3 different openscad versions handle 2020, 2040 or 2060 V-slot vertical supports. The Wid variable is the primary variable you will need to change, but there are quite a few other variables you can adjust as well. It will probably work with other types of aluminum extrusions, but you wil