Plantronics Blackwire button guard

Modification of https://www.thingiverse.com/thing:4598083

Leaves the annoying hang-up button pressable but makes it difficult to press by accident.

Congratulations to the designers of this headset who made the hang up button and the unmute button indistinguishable by touch.

Update: Version 2 has a more secure fit. A small nub was inserted inside to hook onto the indent above the LED.