One of my basses is a "signature" model, which was apparently designed by a famous bass player. His name is already permanently stenciled on the bass, from the factory. I might have a chance to meet him in person, and it occurred to me I could bring my bass with me, and a Sharpie marker, and ask him to sign the bass, and maybe even snap a photo of him signing it. Is that silly? Does an autograph do anything to the value of the instrument (up or down?) If I do it, where is the best place for him to sign it so that it won't wear off and won't look silly?