Here is a basic woodworking technique that can come in very handy when building or repairing a guitar: using dowels to repair holes. Here, I was a little too eager to drill the mounting holes. Then I found that I had to take about 3mm off the neck heel to line up with the bridge ( you can see the small maple shelf I left to support the overhanging fretboard. ) That means the new holes will be only 3mm from the old holes, practically overlapping. In fact, there is a real possibility that the drill bit would pilot its way into the old hole.