I would love to have one of those.

Nice. A friend of mine built one with ball bearings: https://youtu.be/40DkJ9vt5CI?si=2TupxpdiZkEg3nVB

Last night when I saw this post I happened to support it at a perfect round number.

To have a chance of being made into a real set, it needs a little under 5 times that number of supporters - specifically this weird composite number 2^4 * 5^4.