Yes, I forgot to mention Delrin in my materials summary. I've heard Delrin whistles that sound great. Thanks for the reminder.
Also forgot to mention
glass in my summary. I once saw a glass whistle (can't remember where). No one allowed to play it so have no idea what it sounds like. Clear, maybe?
Sadly, I've never been to the Waterford Crystal factory, but I'd be willing to bet they have a glass whistle on display. Anyone been there who can say yay or nay?
BTW, since Chieftain and Overton are often compared (unjustly, I might add), I thought I'd mention here that I recently bought Doc Jones' Colin Goldie Overton hi D and it's wonderful. Requires much less air/push than my Chieftain, with nice clear notes in both octaves. Not quite as loud or "fat" as the Chieftain, but a lovely, full, round clear tone with just a bit of chiff and certainly easier to play. Second octave D is nice and clear. Easy to hit notes clearly up to the 3rd octave D, although only one tune I do hits a 3rd octave D at the very end...and the Overton hits it cleanly. Can't get there with the Chieftain.
I agree that what Habo would probably be most happy with overall is a Burke. They're all good...brass, aluminum, or composite and it's indeed a rarity if you ever get a "bad" one. Even if you do, Mike is so good to work with, he'll take care of it. Unless you find a used one, I'd suggest ordering direct from Mike. Burkes are normally very clear and responsive, very accurate, and easy to play. I have three Burkes and love them. But don't think just because it's a Burke, you won't have to back off on the bell note (low D). Like most whistles, Burkes are sensitive on the low end and you just have to get used to it. Sensitive bell notes are just something whistlers have to deal with. Granted, some are more sensitive than others. My Dixon Trad D is soooo sensitive on the low D, I have to barely breathe into the mouthpiece to get a clear note. But once you know that and get used to it, it's playable and you work around it. I've found most trads are like this....Gens, Oaks, Feadogs, Waltons, etc. The low D on my Burke narrow bore aluminum & brass and my composite C are all pretty sensitive, requiring some control to get a clear note. But again, I'm aware of that, have adjusted, and don't worry about it.
BTW, the bell note on the Overton is pretty strong but will still break if pushed just a bit too much. I still have to back off on the bell note.
DC