
Originally Posted by
oldane
If cutting a hole in the top, be sure you don't cut the braces too. This would compromize the structural stability of the instrument. The top may sag and/or the neck may be pulled upwards by the string pressure.
I can tell a horror story about that. 30 years ago in a guitar shop I was shown an acoustic L5 destroyed this way. The owner had wanted a humbucker in it, but the guitar shop had refused to do the job, because the braces had to be cut away partly so only a shallow strip of brace would be left. They had explained the difference in bracing and top carving between the acoustic and the CES L5, but the owner considered it BS. He went home and made the hole himself, installed the pickup and strung up. Exactly as foreseen, the now very flimsy braces broke, the top sagged and developed a crack due to the added stress in it. The owner even had the nerve to make a warranty issue out of it, claiming that Gibson themselves made PU equipped L5CES guitars, so it ought also be OK to retrofit a PU in an acoustic model. That was of course rejected for very good reasons by the Gibson agent. Now the instrument was stading there in the shop, while the owner refused to pick it up before it was repaired at Gibsons expense. I don't know how the story ended, but it made everybodys heart bleed to see such a nice instrument mistreated in such a foolish way. I believe they showed that L5 to everyone to teach a lesson. Since then I have had a lot of respect for braces and the structural integrity of a guitar.
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