I try to minimize my MP pressure according to MtM guidelines. However, after one year with the new technique, I have lowered my highest range, from F above the staff down to a D above the staff. My high Bb is a piece of cake when using minimal pressure and as much tension I can produce from the corners. I struggle to not let my lower lip go under the top lip. I have noticed that I can climb more easily if I let the top lip just go out ( as the Muuu) to a position when the very tip of the upper lip goes out and up, and I feel the airstream in the area of the lip that is more under and back from the tip. Difficult to explain in words…. (think “inside” of the lip..). The problem with this technique is that the lower lip tends to slip under the top, which I try to avoid.
Every day is a challenge.