I got to use a sax mouthpiece that was printed on a 3-D printer in band tonight.
Parts for this old Yamaha tenor are obsolete, and someone had Jerry - rigged a trumpet slide stop to act as the bis key and G# arm. It worked —- ish. So I cut up a scrap key, brazed it on to the top of the F#, and modified it to receive a Selmer adjustment bar, complete with nice screws. Now it works, period.