(screwless) Hyperbolic Planetary Gearset

This is a remix of the cool [Hyperbolic Planetary Gearset](http://www.thingiverse.com/thing:441722/) by [jsteuben](http://www.thingiverse.com/jsteuben).

I modified the tri-joint and connecting-rods so that no screws are needed; the entire thing now just snaps together. I also made the central "24 90" gear slightly narrower to enable the gears to spin smoothly. And I added a handle to the "small hex key" to make playing with the gears more fun :)

Just a note: this is *not* actually a "planetary" gearset, although I kept the original title. It is a cool gear assembly, prints well, looks amazing, and it's fun to play with, but in an actual planetary gear there's an outer gear which rotates around the inner gears.