Not my mistake...but one I helped fix. The guy was EXTREMELY lucky to miss the fret:
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To be fair, that can be done with a drill press just as easily as a power drill. Gotta mark the depth on your drill bit with tape!
Most drill presses have depth stops - just set it with a dummy piece of wood.
And I saw one like that where the guy used too long a screw and hit the fret with it, lifted it right out of the slot.