Let me just add one thing to what's been said and see if anyone will respond to it. I was trained to do things the right way, but now, since I'm doing them my way instead, I don't use the third valve slide at all. I'd rather adjust the pitch with embouchure, since jazz is all about tone anyway. I always think it looks prissy and pretentious nowadays to see some jazz player take the time to throw the 3rd valve slide out in the midst of a solo. I don't remember seeing Freddie or Maynard or any other jazz great use the third valve slide.