Marcinkiewicz ET7 Mouthpiece for Trombone KS

The ET7 would be THE PERFECT mouthpiece, if it were not for the tiny throat it has.
It is a shallow, medium-sized mouthpiece for ballad solos. The throat, however, is not for everyone: it is the tiniest throat I have ever seen in a trombone mouthpiece. Of course, it helps in the soft playing of high notes, but it makes the low notes too small and stuffy.
The rim comfort is fantastic and the finishing is excellent, as in any Marcinkiewicz mouthpiece.
The ideal mouthpiece for playing "Song of India" in one blow...