I was on a small jaunt across YouTube and ran across a video showing a "Swiss Cube" being made by high school shop students. I liked the object, and decided I wanted to have one. I modeled it for production on a CNC mill, then decided to export an STL in case someone wanted to attempt it in plastic.

https://youtu.be/qZcLwStx6h4

Swiss Cube_Supports.STL can be aligned with the cube to be used as 100% support for HIPS or PVA. Some slicers don't need this, but for those that do - here it is.