Hello Chiffers, I’ve got a question for Tully owners and those just all around more knowledgable then myself.
I was examining the whistle capos that Eric makes and I cannot figure out how you go about accomplishing the statement that you can convert your D whistle into a C… its probably bluntly obvisious 
but I can live with that.
Never mind people, I figured it out myself
And yes, it was bluntly obvisious once I compared the actual fingering charts of the D and C whistles
I thought that I’d pop in to NOT promote my capos. I probably should make a note about this on my site, but they really aren’t intended for anything other than a novelty. They work, but they have inherent problems with their working… ie, no bell note in C, weaker notes on those with the capo (ie. Fnat and Cnat). So, they’re fun to play around with but I wouldn’t actually recommend them for anything but fun or in a pinch.
Best,
Erik
Good of you to post that, ErikT!
~Larry
Yes, that was good of you Eric, I did notice these things when I looked at the fingering charts, but novelty is my stock in trade