Shires TBBO Blair Bollinger Artist Model Bass TromboneThe Blair Bollinger Model Bass Trombone was developed through a close collaboration among Blair Bollinger, Steve Shires, and the craftsmen of S. E. Shires. The resulting instrument is genuinely unique and includes several specific design elements not found on any other S. E. Shires trombone. The Bollinger Tuning System facilities playing scales and arpeggios with the smallest number of handslide positions possible. The weighted mouthpipe collar,