"the sensation you get in your chest when you blow over an empty glass bottle, when I'm going it right. If there's too much breath pressure, the sound will wobble and get woolly sounding, and the core will be hidden or not even there. I'm still struggling with it, but this is the key."
This might be really helpful! I definitely know what it's like to blow on a glass bottle, maybe I could apply that. My concern was that it would be too 'hooty' and not make enough sound, but you addressed that also.
This is going to the practice room tomorrow.
Thank you!