Originally Posted by
John Morgan
Okay, I am a little confused. If the low Bb is flat and we want to raise it, either shorten main slide (all in or cut in drastic cases) or use mouthpiece that goes further in, not further out. But I don't think the further in, further out with the mouthpiece makes a big difference. I own an Adams with an adjustable gap receiver. I don't get much, if any, of a pitch difference in the various positions of the receiver, which is somewhat similar to the mouthpiece fitting further in or further out.
I am a very senior citizen, and it is morning before coffee, so take all of what I said above with these facts in mind. Could be I have it all backwards, but I don't think so.