Ten commandments of 3D printing

This __large__ key chain contains a set of commandments and principles about 3D printing that you may accept or not. If you don't like these commandments, __create your own__ using the [rotating rings keychain](https://www.thingiverse.com/thing:3256469). The outer rings are fairly loose, i.e. are meant to be taken out and in.

Contents from outer to inner ring:
* TEN COMMANDMENTS AND PRINCIPLES OF 3D PRINTING
* Calibrate well for the first layer
* Keep an open mind, be creative.
* Create s