I just had the worst performance at a brass band concert and when reviewing some recording I noticed how extremely high the mouthpiece is placed on my lips. I do not know if it was because of the placement but my lips just seemed more crappy, inacurate, and harder to play with than usual. I haven't payed attention to it at all recently but upon watching it with a slightly blurry recording I couln't even tell I had any bottom lip in the mp at all really. It looked unnatural to me and from memory I don't think I ever play with the mp that high unless it has been changing over time without me knowing.
Now I still have range and endurance issues to sort out and havent gotten much better, but I have gotten professional advice for practicing regarding my range that I still need to try.
Now where this is all leading to is would moving the mp to the center of my mouth help with range, accuracy, and endurance? I also know that the goal is to get the most pressure off the top lip as possible when playing high notes. When placing the mothpiece that high it would be making that lip do all the work and would result in problems right? *From messing with this idea a little bit I can still play with the good sound I do have already once I move the mp to the center of my lips. I loose maybe 1/2-1 note from my range and I'm not sure about endurance because I haven't played extensively at all with it there.
If it is something that would make me better in the long run but take some time to adjust to I'd like to know if it is something to consider before summer comes along when I will have lots of time to practice and work things out.