Thanks for the insight. I guess it makes sense that the tension gets balanced the same between strings and springs no matter what (when set up correctly), and the string "stiffness" doesn't get impacted by which groove the spring is in.

Hey all, just got my first Fly ('99 Classic with mahogany top), and am LOVING it. It's a beautiful guitar and an amazing feat of modern engineering! I'm fiddling around with it and getting to know the features, and I'm wondering what people's experiences are with the 3 "grooves" in the tre...