These are my custom designed pinball pyramid platforms. As a pinball enthusiast, I have all sorts of old used pinballs and nothing to do with them. These platforms allow you to create 3D pyramids (either square or triangle base) and display them as art. Great for game room décor, conversation starters, event center pieces, or all kinds of display uses, and you can make the size or sizes that are right for you.
Simply print the platform, stack your standard 1-1/16" pinballs (no adhesive required), then stand back and marvel at the beauty of those shiny steel balls from all different angles.
If you want to learn the mathematical theory behind stacking objects in this manner, here is a good read on the Kepler Conjecture | http://www.smh.com.au/technology/sci-tech/the-400yearold-kepler-conjecture-that-your-local-greengrocer-knows-how-to-solve-20170621-gwvjd5.html
The name of the STL file denotes both the platform shape and the number of standard 1-1/16" pinballs to complete the pyramid.
For example, S30 means square base that requires a total of 30 pinballs while T10 is a triangle base that requires a total of 10 pinballs (the "1" model should be self-explanatory :-)