In case anyone really is interested, they use computer-controlled lathes to scrape mouthpieces out of a block of brass. Increasingly though, they can make mouthpiece parts (particularly rims that contact the lip) by molding materials such as Delrin. So I was thinking more about having a player like me who doesn't have a machine shop be able to tinker with designs inexpensively. The smallest of adjustments to a myriad of different surface angles in a mouthpiece makes a HUGE difference in playablility. If it didn't, we brass players wouldn't constantly be searching for a better mouthpiece (no matter what we might say in public).

BIAB 2025 Win Audiophile. Software: Studio One 7 Pro, Swam horns, Acoustica-7, Notion 6, Song Master Pro, Win 11 Home. Hardware: Intel i9, 32 Gb; Roland Integra-7, Presonus 192 & Faderport 8, Royer 121, Adam Sub8 & Neumann 120 monitors.