Hi Hajo,
I’ve been working through the MTM course and I can tell I’m not as efficient as I know I should be. As I progress higher my jaw starts to move forward. This is not the intention I believe Greg has when he says to keep the lips forward, milk spout, etc. However, it’s a habit I have had for a long time so it is difficult to change. I am wondering if there are any considerations I should have as I try to change this approach to a more downward pivot when ascending range. My concern is that if this habit does not change, no amount of practice will make up for the issue. Also, there is not any great player I have seen that does this and I know that it is something that has held me back.

It seems as though most people start with a downward horn angle and roll their bottom lip in, pointing the trumpet further down, as they ascend. My issue is that I have adopted the habit of doing the opposite, and have never had good or consistent slotting and ease of playing above the staff. It’s a complex issue so I don’t expect there to be a single solution to this.
Thanks,
Rob