Not in the guitars. They keep the shape & tune and have a chimeyness in the presence range.Rusty the Scoob wrote:How is his graphite insert different than say, the graphite stiffener bars on an AM Standard Fender? (the basses have them, not sure about the guitars). Which I LOVE by the way... great feature to have in New England! I've only had to give my truss rod one tiny tweak since it settled in after I got it last March.