So after finishing up my last real big gig, I finally spoke to my teacher about changing my embrochure. My endurance hasn't been as great as it used to be, my range isn't as strong as it should (even though I have a a double c that isn't especially fat). I have a lesson with Ms Laurie Frink next week and I was wondering if anyone here had any experiences with her they could talk about? In addition, my range has obviously suffered a lot, I can only hit around a g above the staff tonguing and I can get a high d if I slur. Is this normal to lose this much range and typically, how long does it take to get back? I really feel this change will help my playing overall but I am very nervous about it at the same time. I could use some experiences from other people with this stuff to help me understand the benefits and such.