So I found out yesterday if I curl my lips in just right I can shoot my range up alot. Is this one of those bad habits though to where if I play with my lips curled in for just my high range I will have the problem switching from low to high notes? I might be able to constantly play low and high with it curled in but it seems a little unatural to do it on the low notes. Also when you "squeek" out those really high notes, would practicing trying to get more control of those notes and slowly add volume/air allow me to expand my range to those? Aside from being able to sqeek really really high stuff it makes my range maybe a few notes higher and tons easier for the ones at the very top of my range. The only problem is I think I enjoyed playing too much higher stuff with that new technique the day I learned it and my lips felt terrible today. So this leads to my last question. Should I be practicing more on these higher notes so it doesn't "blow out" my lips the next day or is it one of those things to leave alone untill I can naturally control it more? Thanks for reading.