I met Emily Whiting (one of the authors) earlier this year; she had a few of the fabricated tops with her at the time and I spent a few minutes playing with the

I met Emily Whiting (one of the authors) earlier this year; she had a few of the fabricated tops with her at the time and I spent a few minutes playing with them. It should be noted that while these are much easier to spin than un-optimized solids (which don’t spin at all), they are still much, much harder to spin than normal tops. Still, it’s a cool little project.