ForeverSpin Spinning Base cup

This is an accessory for the Spinning base available from https://foreverspin.com/

I was a backer and I love my top and base, but the one thing I didn't like was my top getting loose and rolling off. So I made this.

I was able to make it in Tinkercad and with the help of my digital caliper. This is my very first thing I designed from concept in my head, measuring with the caliper, and printing with my Monoprice Select Mini

The result is insanely precise. I had to push with some force