Hi Manny & All. What a nice forum. Short background: I'm a comeback player (trumpet major @ NU 18 yrs ago) and recently began studying jazz improv. I only (have time to) play 4-5 hours/week. For the longest time I was one of those who thought Monette's stuff was all myth & magic & no substance. I recently became a believer after trying out some of his mouthpieces! Truly amazing difference: the ease and evenness (of tone) going from the middle to upper register simply blew me away. I also found it instantly easier to skip around intervals (like in Bousquet #3) My range didn't increase, but was easier. So I settled on the B4S and love it. No problems the 1st week, but the dreaded double-buzz (rasp) has crept in - only on the middle B-flat, B & C. It's persisted through today (2nd week w/ the mouthpiece). The only other thing I can tell you is that its worse on my benge than my bach (which is a heavier horn). Any suggestions are appreciated!