Ninja Tri Fidget Spinner

[phrewfuf](https://twitter.com/phrewfuf) liked the design of [3DanielDesigns](http://www.thingiverse.com/thing:1936727) and I put a cad file together with the intent to
test a press-fit design for the bearings without having to worry about printer accuracy.

The spinner was designed somewhat like  this spinner. The shape and sizes differ.