I got a Gretsch 6118 about 9 months ago. I really like the tone and the way it feels (not to mention how cool it looks), but the tuning isn't as stable as I would like. I realize that it may not ever be as stable as my fixed bridge guitars, but I'm wondering if anyone has any suggestions for improvement. Would new tuners help? If so, does anyone know if there is a set that is a drop in replacement? If I'm going to replace them, I would most likely get locking tuners. I've also heard about pinning the bridge so that it doesn't shift around. What are the pros and cons of having that done?