Just had my Conn 6M overhauled and I just started playing again. It seems to be a smaller bore/smaller alto than my daughter's Yani. My question is this. If a horn is designed to be smaller/brighter etc. Does a certain mouthpiece ruin that natural ability of the horn? For example, I have a Jody Jazz HR for this horn and when I go up in the upper registers it almost makes my ears hurt. It could be the type of reed I am using, but it is definitely noticeable that a horn like this could produce high pitches that are sometimes hard on the ears. Has anyone else experienced this before? I am still in the trial phase of mpc vs reed vs reed strength and I have recently switched to some harder strength Alexander Superials (3.5).Just looking for some comments. Thanks.