Anyone had experience with this? http://www.stewmac.com/shop/Tools/Wrenches/Gripper_Truss_Rod_Wrenches.html It's so weird that I got this promotional e-mail from Stewmac today, since it was only yesterday when a luthier whom I trust gave me the sad news that my bass needs a minor surgery right because of the problem that this gadget is intended to solve. First, I couldn't believe my eyes, like they knew what happened... Maybe I'll order one and give it a try before going through an operation. What do you say? And also this guy offered me to make a new neck for the same bass. But when I told him that I'd appreciate it if he could fit the neck into the pocket as tightly as possible, he said that it was not that much of a big deal, referring to some guitars and basses with not that tight neck pockets but still resonating and ringing for years. As I know nothing on building, I was pretty convinced with what he said, but I'm still confused by the controversy. I mean, seeing that guys at Sadowsky sparing valuable time on sanding the neck and neckpocket to fit tight, I assume it must have something to do with the overall sound quality.