6 Spoke "Ball Socket" Spinner

So, thanks to my kids.... I've been supplying the locals with Fidget Spinners. Using the typical Skateboard Bearings for weights, and Ceramic "Hybrid" bearings for the center bearings....

But I kept thinking there had to be a better way. I had seen ball bearing spinners on here, but they required you to heat the bearing and melt it into place. I started worrying about younger children getting the ball out of this type of spinner and swallowing them. So I decided to model up a "Ball socket" for the ball bearings. once installed, they swivel inside the ball socket just like a ball socket joint.

To install them, takes a fair amount of force (hence the relief at the end of the stem) and a small vice, or a arbor press works the best..... however, if your plastic is flexible enough... a quick tap with a Hammer will install them as well... just be careful, it can crack your hard work!

They take standard .500" steel ball bearings (available for as low as .10 a piece) and I like t