Graph Tech Ghost Acoustic MIDI - Manual (Page 19)

Tape the template to the edge of the instrument, and
mark the center of the circles onto the guitar by tap-
ping through the template into the lacquer using a
center punch and a small hammer. Using an X-Acto
knife, slice through the template along the edges of
the inner rectangle, etching lines in the lacquer to
mark the edges of the mounting hole. Remove the
template and make sure these lines connect in the
corners (this prevents your lacquer from chipping
beyond the scratched lines when you begin drilling).
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