Gears
An easy to print bevel gear in three sizes, to match Adafruit's three neopixel ring sizes.
https://www.adafruit.com/products/1643
https://www.adafruit.com/product/1463
https://www.adafruit.com/products/1586
Made with the help of http://www.rushgears.com/tech-tools/part-search/build-custom-gears