I've got a 5-string Czek Spector. As of late, some minor buzzes are causing me aggravation. The action is really high...not too bad, but a little higher than I'd like...but if I lower it, I get this real quiet buzz, almost a fretless-like tone, ALL the way up the neck on the A-string, D-string, and sometimes the C-string (it's tuned E-C). The neck is SLIGHTLY bowed away from me (I'm going to fix that soon), but I can't figure out how to get rid of the buzz. The only thing that has worked is raising the srtings, but I don't want the action higher. Help!