I recently purchased a used but basically new RSR Tenor Sax. In the case, I found a Gigliotti Maestro Tenor Sax Mouthpiece 7* still in the box. I'm an intermediate player. Should I be using this mouthpiece, and if not, what would it be worth? I researched Anthony Gigliotti who was a 47 year first chair Clarinetist with the Philadelphia Orchestra. He also developed and marketed his own woodwind mouthpieces. I found A. M. Gigliotti, Inc. but it appears to have gone out of business....any info would be appreciated.