I purchased a 2013 4003 2 weeks ago and am having a tone issue with the A string. When I bought it, the E suffered the typical dead string issue even after the store adjusted the truss rods. I replaced the factory strings with my favorite SS strings and adjusted the intonation for the A & E strings which were extremely flat at the 12th fret. No more dead E, however the A string from the 3rd fret up sounds like crap. Not dead, but actually like its boosted, extremely muddy and distorted. Open A is bright and punchy and is balanced with the other strings as far as volume and tone. The only thing I found to help balance the tone was to have the vintage tone selector in and made amp adjustments. Bummer, because I prefer the old school tone. It was before a show Saturday and I didnt have time to mess with it. Any ideas what would suddenly change? I certainly appreciate any suggestions.