I've been doing quite a lot of trumpet big band work recently, and am struggling a bit with lots (hours) of high register work. I normally play using a 1 1/4 C Bach mouthpiece, but am in need of something perhaps more shallow to take the strain? Have been advised that a Bach 1D would be a good bet - i.e. similar cup diameter to what I'm used to, but less depth. Anyone have any opinions on this or any other moutpiece suggestions for the job?