QAV210 protection kit

# QAV210 protection kit
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### Purpose

The QAV210 Charpu edition is such a beautiful frame, well designed and solid.
It would be sad to scratch it :(

So, this kit is a protection kit :

- arm protection to don't break arm bumpers
- bottom protection to elevate the center of the frame of 3mm
- optional PDB protection to protect PDB's soldering of wet grass or something

Feel free to remix it :)