30m's like large and round chambered mouthpieces. And I personally think that mine at least doesn't like baffles. Besides that, support and correct air stream was the most important thing. I know I used to warble on the low end, and no longer do.
I use a Barone Jazz 9 mouthpiece with my 30m. The reeds you're using seem ok...
I use a Barone Jazz 9 mouthpiece with my 30m. The reeds you're using seem ok...