> the PCB is itself intended to be used as a plectrum, to pick the
> string being tuned

A couple of reservations -

Guitar strings are pretty abrasive. I'd add some extra PCB for
wear and tear

The g forces might upset the crystal and there'd be a lot of
vibration and knocks too

Guitarists are pretty fussy about picks. I use both hard and
soft. A stiff PCB would affect playing style. Unless you mount
a favourite pick on the other end of the board, but that's getting
a bit unwieldy

I'd probably not use this as a pick

Joe
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