Totally original, never been worked on. I’ve never played  one, but have only heard great things about these pieces. I’ll have Tom do a playtest video.
The SR Technologies Alto  L-85 Polycarbonate mouthpieces are based on the design of classic "New York" mouthpieces. The L-85 tip opening is .085 inches. Computer machined from Zelux-M, a polycarbonate resin which is...