Enigma encryption device

This thing is based on the [Pringles Enigma by Franklin Heath Ltd](http://wiki.franklinheath.co.uk/index.php/Enigma/Paper_Enigma) that I discover via [EscapeTechno's Machine Enigma](https://www.thingiverse.com/thing:3936519).

Engima was probably the most advanced cryptographic device of its time. The challenge of decipher it had eventually lead to the realisation of the first computer.

Now, this work being done, I find it very useful to illustrate some concepts like reversibility (ciphering and deciphering are done the very same way) and information in computer science or to show how, in cryptography, a simple tiny device can encode so hard that break it require the resources of a nation !

Files:
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Why all files are suffixed with "-30"? Because the radius is a parameter in the code and my first choice was 50mm that implies quite large prints. So I reduce this parameter to 30 (which seem to be near the limits of what I can print for the bigger pieces and for the smaller