Hello my fellow plastic pushers- I added version 5- rounded off some edges and strengthened the bond on the arms to the body. I printed it flat at .1 resolution with supports.

Center still uses 2 stacked bearings, outsides are single. Prints best standing but that will require a raft and both (flat or standing) require supports. Some clean up will be required, it's a bit delicate so take your time printing and installing the bearings.

Notes from original design:
This is a fidget spinner of course.... the center uses 2 standard 608z skateboard bearings or similar (22 mm x 7 mm) stacked back to back. Used an old pencil drawing as inspiration that typically keeps me occupied when i sit and doodle; and has for many years. Most likely picked the shape up from a old math class eons ago.

Hope you enjoy, hard let me know if I screwed it up anywhere my eyes hurt after staring at it for a while!

http://www.bbc.co.uk/education/guides/zk8hvcw/revision/4