Just recently I've started playing my Gretsch again on the daily. I normally used 11-49 gauge strings with a wound G string (.021). When I began playing it again I wanted to go with lighter gauge strings, 11-48 with a plain G, so I could bend that G string a little easier. However, now I'm getting a ghost note (sitar like sound) on the B string at around the 10th fret on up. I've adjusted the truss rod both directions and measured the action (both raising and lowering it) and I am still getting the sound. I peered down the neck and there is a slight hump at about the 15th fret . Thing is, is that only the B string is doing it. Not the high E nor the G. The hump is not terrible and I really only hear it when playing unplugged. I'm not sure it would even be noticeable to someone that didn't know it was there. Yet, I know it's there and it's bugging me to death. I guess my question is. Would fixing this require a full neck reset? I'm going to be taking it to a luthier in about 2 weeks to let him look at it. Just wanted to get some opinions first. Thanks for listening everyone.