Hello Jiggers - I played Sweetones for some time before buying a pair of Susatos. Mine are both tunable I'm afraid. What I have found is that the Susato is a bit more tempermental as far as breath control goes than the Sweetone - its a bit more finicky that is. At the same time, I think it gives a very lovely tone.

On my "C" whistle, the high B tends to be a little flat - nothing that a pen knife carefully applied won't sharpen up a bit. My "D" whistle is spot on - seat the mouth-piece squarely and you're in business. If you're getting odd notes, maybe check the individual notes against a tuner would tell you what's up, eh?

If I remember correctly, fingering for the lower two octaves were the same (could be mis-remembering here - it has been several years since I played the Sweetones, although I still have one rattling around in my gig bag...) The third(!) octave was a bit different. Of course, the fellow who showed me those fingerings played military fife...

Cheers -

Pete