Thanks Jutta. It may depend on the mouthpiece and lips. For me, I play a Bach 3C and my lips aren’t thick and it feels like my lips are able to stay within the diameter of the inner cup at both extremes–wide open low notes and very small diameter high notes. Might be different for others. Would be interesting to hear others take on this. I hadn’t thought about this before.

What’s your concern? Does it not feel right / sound wrong?

Hope that helps.