Hi, An elementary question from a beginner. When is it necessary to use the third valve slide while playing? I have noticed when I watch Jazz players I have never noticed them using it. I seem to notice it mostly with classical players. Is it used much in brass band playing? One more question if you don't mind: Do brass band players use mostly short or long cornets or both? I have a long cornet and I am thinking of joining a beginners section of a brass band. cheers.