I have a friend, and this is not an attempt for me to speak in third person, I have an actual friend, who wants to become a strictly high-note player... He plays a lot of jazz and is wondering whether practicing on a shallower cup will effect him detrimentalli or not at all, and he won't advance his playing ability. That's his main problem or concern, that when he practices with that shallower cup, since it is easier to play higher notes with one, he thinks that that means he won't develop as fast as he was on the deeper cupped mp. I would like any feedback that purtains to your thoughts on whether or not there would still be any development or whether it would be the same or even detrimental to his playing ability. And also, I'd like to ask whether there would be a change in the practicing of fundamentals or the actual practice routine, making it longer... playing songs or long tones up an octave or even doing scales. Either or, in which case, there needs to be a change? or does he need to stick with the same routine he's always been doing?