Ok…four whistles. I found a Feadog D while I was out today 
Edit: And it’s my favorite as of…NOW
Now, it’s 6 
Clarke C
Clarke Trad D
Clarke Celtic
Feadog D
Oak D
Acorn D
The last two, I really don’t like that much yet. The Clarke Trad and the Celtic are the ones I’ve played the most since acquiring them.
Brass Acorns are some of the worst I’ve ever played, but the black ones are some of the best, ever.
The Acorn is painted green and the Oak is plated. I may use them to learn tweaking. They flip pretty easy compared to the Clarkes I have.
Really? It doesn’t seem possible for a raw brass Acorn whistle to sound different from one that’s painted black, if all other factors are the same. Or is the difference just in the way they feel in your grip?
So… you find the perverseness in the electronics, not in the split reed pierced bloated sheep’s bladder… 