Memory Keyer Box for iCom radios

This is intended to house a set of 6 arcade buttons (Sanwa OBSF-24) and be wired inline with an iCom microphone to provide one-touch access to the push-to-talk and memory keyer functions in a contest environment.

This is the 2nd major revision to the design following 1st semi-successful print and is final until I get around to adjusting a few overall dimensions for ergonomics.