i like the idea of "littlebala".
But i think there is a need of a ball bearing.
So i redesigned the original models to use a ball bearing (22mm x 7mm, 8mm drilling).
Now it should runs really smooth.
I designed different indicators for different uses ;)
I also added a model of the bearing you will need.
If you need a comparison or want to use the spinner without a bearing.
The bearing has to fit tight so you will may need sandpaper or glue.
Please send me your makes and have fun playing =)