I bought a Taylor 710e back in December from my local shop. It's a really incredible guitar but there was a nasty buzz on the B string which I posted about here https://www.thefretboard.co.uk/discussion/196247/
It went off to Taylor, via the shop, for them to look at and it's come back all fixed. They didn't leave a note in the case to say what they did so I emailed the guy in Netherlands I'd been emailing and found out what they did. Their reply said:The issue was caused by poor setup that created rattling noises from inside the body.The work done was the following:- Reset neck- Truss rod adjustment- Cut nut - Smoothed saddle- Replaced preamp (old preamp had loose cap rings)- Replaced pickup- Glued parts on power supply- Modded battery cartridge- Replaced battery- Tightened cables inside body (extra wire clip)- Tightened standoff around pots- Clean and restring with medium strings.
Really impressed with the amount of work they did - never thought they'd replace the pickup etc too. I really am impressed!