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To avoid replacing a bridge that has the string holes inaccurately positioned, the old holes may be plugged and new holes drilled with the bridge
still in position. This is a topic that has been covered a few times on this forum but this description of the procedure by forum member Fritz is
about as clear and precise as it can be
http://www.mikeouds.com/messageboard/viewthread.php?tid=14844#pid10...
Be sure to mark the exact positions of the hole with a sharp pointed tool on the front face of the bridge (not the back as the drill may tend to
wander out of alignment). The scriber marks will act as a positive guide for the drill bit when starting to drill. Drill slowly(by hand - do not use a
power drill!) little by little, backing out the drill to clear any dust build up that may cause the bit to jam and break.
Use a standard mechanics twist drill bit (1 mm or so in diameter) - they are very cheap, made in China. The bit may be epoxy glued into a long wooden
dowel that will act as an extension piece to facilitate the drilling process. Protect the surface of the sound board with thin card temporarily taped
in place. |