Another fidget spinner yay! This one uses 3/8 slingshot ammo for the outer weights. The steel balls snap in and are loose to serve as an additional fidget feature. You can roll them between your fingers. I've attached the source file. Modeled in Fusion360. For a quick and dirty tutorial on how to design spinners in Fusion360, check out my other model, the Luno Fidget Spinner: http://www.thingiverse.com/thing:2098458
Public domain, so feel free to distribute/sell.
Slingshot ammo: https://www.amazon.com/gp/product/B00JZ18KNY
Update: Cap design improvement. Uploaded stand alone cap model and source files.