I lost my Buice
about 3 years ago. Along with my Herb Hornstra. They are either misplaced or truly lost. Not sure which.
Billy makes a very nice call so I will speak to that one. He made me one in lignum vitae a few years ago and there were about 3-4 different mouthpiece choices, and I chose Delrin. The delrin was a pressure fitted mouthpiece but you could get varying pitches of mouthpiece based on the diameter of the hole.
So there you go. I was no help!