There is an old trumpet player in Sydney who used to carry a very old crumpled newspaper cutting around in his wallet that talks about the correlation between screach trumpet playing and brain anurisms (excuse the spelling. My spell check has crapped itself). The article sited cases of players who had done themselves some serious damage trying to play high.He used to say "Son. Don't try playing high. Most people are not that good at it and it is bad for your health. Play with a good sound and you'll always have a gig" I think his argument has merit. I don't know how many sites I've visited where someone is trying to indiscriminately hit notes in the stratosphere and there sound is atrocious.