mouthpieces

This is a copy of a letter that I almost sent to a friend. You might find it interesting. it deals with new mouthpieces and several phenomena that I have noticed
I tried the 4G today and couldn't play it. Your are right,it is too big. I encountered a strange mouthpiece thing that I have discovered for myself and read about.When you first try a mouthpiece you might temporarily forget bad habits and sound really good. The time that it takes to know if the mouthpiece fits correctly varies. For me, it is about ten days. I sound the best about 5 days into a mouthpiece change. I actually timed that change to peak the day of my all-west audition. I usually digress after five days. If the mouthpiece is good I will only digress a small amount. If it is bad, it will cause me to sound terrible in about 10 days. I know that if I work hard enough I could probably make any mouthpiece sound good. I don't really want to and I don't have time to struggle with a major mouthpiece change. So far, I have discovered that I can play just about anything the size of a 5G, 6.5 AL or 7. I have discovered that the bigger the mouthpiece the less characteristic sound you get. On a 3G I sound like a foghorn. the 4G makes me sound extremely resonant but the body of my sound fades in and out. Have you listened to the Jay Friedman solo recording? He plays on a 3G. The 4G made me sound similar to him. If you listen you will notice that the characteristic sound fades in and out. Sometimes he just seems to get resonance. If you were to isolate one of these "super resonant notes," I doubt that anyone would be able to tell that it was a trombone. They might think that it was a euphonium, or maybe some kind of whale. I really like that recording and that was the sound I used at all-west. However, I now believe that a trombone sound should be identifiable. I listened to a recording I made shortly after all-west and I had moments where all the mic picked up was resonance. I am looking at a Griego 4.5G. I believe that it will be a balance between my Bach 5G and Bach 4G. I wish that Bach made a mouthpiece of that size.