My 356-GTB 6 string has gotten to the point where I can't get good action without buzz, no matter how loose I put the adjustment screws (tightening them puts MORE bow in the neck; I need less). After reading info on the site as well as talking to Dave Bunker, I've followed his instructions and pulled the neck apart, and attempted to put a little backbow back into the cold-rolled steel rods. Has anyone else successfully done this? Anyway, I definitely could see a difference in the rods - but once I put it back together, I'm not sure it made any difference as far as the neck is concerned. Has anyone done this operation on their PBC or Bunker? Is Dave Bunker just jiving me so he won't have to make good on the "lifetime neck warranty" or what? I've met him in person (I bought my bass direct), chatted on the phone with him and exchanged several emails, and I've had ups and downs when dealing with him. Thanks for any help!