I'm not the kind of guy who is always playing with is trust rod (No pun intended). I have this fretless Fender MIA Jazz Deluxe I've bought last year and never had the time to really use it. When I bought it in the store, I've notice that the neck was slightly loose (neck pocket). After that adjustment, she was buzzing a lot at the high register. I brought her back to have it adjust, it was better but not completely gone. Since then, no matter what I do, loosen the trust rod and/or raising the saddle, the buzzing is still there. I have the impression that the neck is bow (I know a neck is concave but this one seem to be too much from the first fret to the 15), is it possible?