I would suggest boxwood, although I haven’t any experience with it. From what I have read about its intonation and density, it may be a solution. You can hear sound files on The Early Music Shop homepage. (https://earlymusicshop.com/products/moeck-rottenburgh-soprano-recorder-in-boxwood) I have never heard ebony to be described as “airy”. That term is often akin to a maple recorder. Personally, I play a Moeck 539 Alto and find it far from airy. Could it be the brand (not stated) of your instrument? Although, seeing your question has been floating around for 4 years, I’m sure you have solved this problem… 🙂 It (your inquiry) is like a message in a bottle…
