I play a Bb Cornet, and I tried using a 7C Jupiter Mouthpiece on my cornet, but then my teacher noticed and told me to switch right away to Denis Wick 3b(The one I used before the jupiter). Questions: 1. Is it bad to use Soprano mouthpieces on Bb cornets? 2. Are Jupiter Soprano mouthpieces bad to play on? 3. What should I use as a Soprano player?