They can't be mentioned at all? I mentioned both Sindt and Burke in a very sideways manner and don't see the problem to be honest, the thread left the subject of less clear top notes almost from the outset. Actually, come to think of it, it was yourself making the second post suggesting Les should buy a Dixon. How's that from drifting off subject.

While we're at it, I once tried a half dozen of Tony Dixon's tunable alu whistles in Custy's (I wouldn't be able to pinpoint the exact model I am afraid), each of them except one, was more screechy in the high notes than the worst generation I have ever come across. And they came at fifteen times the price of a Generation (at the time, Dixon : €60, Generation €4). I do have a Dixon Trad which works fine, you have to weed out the ones with hissy high G and/or E before buying one, it has a bit of a hard edge to the sound that becomes irritating after a while but it's a nice enough whistle.

That's the thing about whistles, you really need to try them before you buy and pick the one you like best regardless of price or make.