About this 3D model

This is a REAL solid of constant width. It is built from a Reuleaux Tetrahedron with the edges replaced by a carefully constructed sphere sweep. I recommend turning off "Automatic Reload and Compile" in OpenSCAD. It may take a long time to compile. Blend and STL files have 3 copies. I recommend using full support material. You may want to scale the size up. By Patrick Roberts. For more information about this unique shape: http://www.xtalgrafix.com/Spheroform2.htm