Hi all, I’m having some trouble playing on my current mouthpiece. I play on an SMX4, and it might be the mouthpiece or me, and for some reason my upper lip starts hurting and gets tired when I play above an Eb above the staff, and I used to be able to rip out high notes (Bb, C) with ease. And it didn’t hurt at all. But now I am using as little pressure as possible and using only air and I can get them out but I just feel so heavy in my mouthpiece and it’s concerning me a lot. Even in the middle range like in the staff it still feels very weird and unnatural. I spoke with my professor about it recently and he said it might be the sharp rim on the SMX4 and he advised me to try a Bach 3 or 4G instead. I was wondering if you’ve heard of this problem or experienced it yourself? It made me feel like I had revered to how I played in highschool, not able to easily hit high b flat without hurting my mouth. My teeth seem to be digging a little into the right side of my upper lip. It feels like I’m fatigued after just half an hour of practice and I used to practice 4 hours a day on occasion! Any advice? Please and thank you !