Headset boom mic

Model originally uploaded to Thingiverse at https://www.thingiverse.com/thing:4920416.

REMIX OF https://www.thingiverse.com/thing:1060861

The original design is good but I found that it had a few weakenesses, namely the microphone cable at 90 degree angle which would break without any strain relief.

My remix now requires you to loop the wire and use a zip tie to hold the wire onto the arm, a shoulder is added for the ziptie to sit against so it doesnt slide.

I have also changed the dimensions of the magnet used, it is now 7x2mm, I have added 0.25mm of tollerance in both the arm and the mount, on my test print it sat perfectly in place.