[TPIN] Rotary Trumpets (Schmitt backbore)

[Achias1 at mchsi.com]

Can anyone educate me as to what a Schmitt backbore is and what advantage it 
provides to the mouthpiece characteristics?

All I know is that the mouthpiece that came with my Selmer Paris picc was a 7E with 
Schmitt (117) backbore. I think that all Bach E cup mouthpieces have the Schmitt (117) 
backbore as standard. Finally, I gave up using the 3E on my picc because I think my lip 
was bottoming out on the cup. I may try again someday, but for now, I'm sticking to a 7D 
that I found in a bargain bin a couple years ago.

Dave



> Make sure to use a mpc with the correct backbore or the instrument  
> won't play right. A stock 3c doesn't cut it. Most makers now offer a  
> Schmitt backbore or another version for rotary tpts.