I've begun "getting my chops" back into "legit" shape after a hiatus - I've been playing for a long time, primarily in drum corps, but haven't played a "legit" gig since 1997 or thereabouts. I've gegun using Caruso it in conjunction with some of the Schlossberg stuff, and a few lighter articulation / intervalic things from Arban. The thought process is first just to get an even sound across the horn, and then tackle some of the dexterity, and more complex articulation/multiple tongue things. initially, I'm finding several things, primarily - 1. in working long tones, and the Caruso 2nd's - I'm finding that the back of my tongue is arching too high for notes that are lower in the staff (second line A or below); and that on the m'piece especially - there is a marked difference (improvement) in sound quality as I ascend beyond the A. It's quite pronounced. After I've been playing for about 15 minutes, this goes away. Can anyone suggest an excersize to elimminate this from the "get go"? 2. when I begin working mixed articulation patterns, I'm finding jaw movement (again, second line A and below) - sometimes, this jaw movement cause a slight "frack" on an attack. Any ideas????