Keep contributing Phil!
I have little to offer in meaningful contribution at this point - given my lack of meaningful whistle experience (newbie here). However, the comments are a delight to read.
Well,I am only set up for making metal whistles,I find that wood is a wonderful material but it can be difficult to find well seasoned and as always takes alot longer to work thus making them very costly.
I’m using alloy as this is my medium but want to try and get a very different sound by changing the design.
I have taken note of all your great recommendations and hope that I can build in most of them.
When the first ones come off the production line but before we go into full production,I’d like to send out 3 or 4 for testing and feedback so if you are interested in some market research send me an email at the usual address.
Thanks for all the suggestions.
Phil.
Phil,
Sorry for the late response. Here are my ideas for your new whistle:
- Made of metal
- Plays in tune in both octaves - no screeching in high octave
- Doesn’t clog easily
- Low wind requirement
- Chirpy sound - i.e not flute-like
- Tuneable
- Can be heard in a good size session - but not too loud
Hope this helps!
Cheers 
Gerry