Fidget Spinner - M8 weight

Edit 1: I added a Thumb cap. I like it better without, but whoever needs it can use it.

I wanted to have a fidget spinner, but I didn't want to put in three or more bearings. So I designed a spinner which uses M8 nuts as weights, and it works great! It is also a bit smaller than the ones with bearings, making it easier to spin with small hands.

It is designed to have a tight fit, but if needed the parts can be taken out after putting them in.

With cleaned bearings, it spun up to one min