I'd like to be able to use my mint-condition 1917 Buescher tenor on gigs, but no matter which mouthpiece I use, I end up playing almost a half-step flat, and the low notes are suppressed. I'm aware that open-chambered mouthpieces work best on these saxes, but even the original Buescher mouthpiece that came with the horn gives me the same problems. Any ideas on a specific mouthpiece that would work? Thanks for your help.