Fidget Spinner 608 Bearing Convex Buttons

These are snap buttons for a 608 "skate" bearing for a fidget spinner. You can check out my spinners weighted by ball bearings here:
http://www.thingiverse.com/thing:2063397
http://www.thingiverse.com/thing:1821445

I designed these because I found the flat ones commonly found here to be very uncomfortable and difficult to use. These are thin but have a good concave which really helps you grip the spinner. I had difficulty printing the small pins on other buttons and spent lots of time sandi