Hi - I've been playing 30 years but have always left guitar setup to others until recently. I found the action a little high at the 12th fret on my Custom 24. Looking at the neck it had quite a concave bow on it, so I tightened the truss rod (clockwise looking from the headstock). This seemed to flatten the neck out a fair bit, and I have no fret buzz, so all good. The action does feel better. However, I really noticed that the string tension seemed higher. Does this make sense, i.e. by flattening the neck have I lengthened the distance slightly from nut to bridge and need a higher tension to achieve the same pitch? Am I talking nonsense here - please set me right, I am a total newbie to setup.