I have a new folder open on my website entitle:
Whistle Open Design
Location: http://www.kingsmills.us/whistle-open-design/
It contains spreadsheets for various whistles that I make and covers multiple keys.
Eventually, each new design will be available here for all the specifications.
Open, indeed. Thanks, Daniel! 
A couple of clarifications, if I may …
The length (column H): how far up does that go? The bell end to the lip, to the fipple, or to the far end of the windway?
“Emb Width” and “Emb Height” (column F and G): are those the dimensions of the window opening?
Column H is theoretical length, whereas the cutting instructions under body length is real length.
You’ll also notice “Hoover Length” on some. That is for making tonebody adapters that are compatible to Mack Hoover mouthpieces.