Hi all, I just got a Yamaha Attitude Standard and unfortunately the tuning keys seems a little loose. By that I mean that the keys on the machines are somewhat pinned together, the gear and key are not all one piece. That being said whenever I hit a high note they create a sort of buzz, as the keys are a little loose on their shaft. Which doesn't happen after I've just tuned the string- so they sort of lock up when I'm tuning and function properly but if I'm playing hard they loosen up and buzz. Has anyone had this experience and is there a repair or is replacement my only option. I'm sure I'll figure something out tonight but if I need to replace what will fit this bass. It has 3 screw back open gear type machines. Thanks!