Mini morse paddle

Morse paddle inspired by http://members.ziggo.nl/cmulder/paddle.htm
and http://www.palm-radio.de/

This paddle is very much a work in progress, but the current version (V2) is functional.
Here it is in use (I'm a beginner operator, timing is a bit tight):
https://youtu.be/1xGeypPl-cU


The hardware required is the following :
* 6 x M4x4mm set screws (https://www.mcmaster.com/92605a110)
* 4 x M2.5x5mm phillips head screw (https://www.mcmaster.com/92000a103)
* 2 x M2.5x12mm phillips head screw (https://www.mcmaster.com/92000a107)
* 6 x M2.5 nut (https://www.mcmaster.com/91828a113)
* 1 x ball plunger 5mmx6mm (http://a.co/d/gtlAK51)
* thin headphone wire (2mm) [for example](https://www.markertek.com/product/2490/mogami-w2490-ultraflexible-miniature-microphone-cable-gray-per-foot)
* for the v3 version: 3.5 mm CUI phone connector model [SJ2-35464A-SMT-TR](https://www.mouser.com/ProductDetail/CUI/SJ2-35464A-SMT-TR?qs=%2fha2pyFadujXKSHC8iTQaB3wFYjSKErzhvVx8GPUh5ZNgh