Knurled Spinner Remix

Kids loved the design of the Knurled Tri-Spinner http://www.thingiverse.com/thing:1871997 by @CarryTheWhat. However, they kept breaking when my kids dropped them. I modified the SCAD file to make the area around the center bearing significantly thicker (3mm) compared to before. Hopefully, this makes it stronger.

A 2nd modification was tightened the bearing hole tolerances. A couple of my scad default generated outputs was not holding the bearings in tightly.

Let me know how th