Flâneur I know what you are talking about! I bought a NY Jazz Alto piece that I wasn't completely satisfied with because the sound was to spread for my preference. I talked to Aaron about it and he said he would make me a new one with a slightly higher baffle, but with the same chamber and facing and he said all I needed to do was send the old one back! I only paid for the shipping to him, he spent his own money sending the new mouthpiece back to me. Basically what I'm getting at is Aaron is an amazing mouthpiece maker and person, the guy isn't satisfied until you are, and he knows exactly what needs to be done to make a killer piece just for you.
and a quick question Flâneur is yours the NY Jazz or the Ceramic Chamber or the regular Jazz model? I'm also wondering are you using the stock lig or are you using something different?