Miyot

I'm not sure what you mean by a red ring. I always have a little mpc impression after a session. I try to use minimal pressure, but even a short practice leaves a mpc impression ring on my chops. I've seen pictures of many professional trumpet players with mpc rings. Mine fade after a while. I think it is nothing to worry over. At least I don't. After 2 straight hrs of playing I lose some range as well. I mean who wouldn't. About the tongue, don't ask me. I know mine gets tired after a lot of work, but I can always move it. Mine gets a little slugish with a lot of work. But I mean whose wouldn't. If my tongue gets tired I take a break. If this is wrong, I'm sure someone else will jump in to help.