Double Simple Fidget Spinner

What's better than one spinny thing? TWO spinny things, of course!

Combine two fidget spinners in one for twice the fun.

I'm still perfecting this design, but it is functional.
- Version 0.5: Thickened center hubs; improved mounting post reliability (recommended for printing)
- Version 0.4: Reinforced long and short body and hubs
- Version 0.3: The initial version I posted.

Note for Versions 0.4 - 0.5: In OpenSCAD the preview is not rendering properly for me; some of the angled edges on the long strut don't show up. When I do a full render it is fine. It also exports to an .STL file just fine.