This is a remix of the Clarke penny whistle. I had to make quite a few adjustments as I learned how to get it to sound right.
It does sound good but is susceptible to being overblown like other types of this instrument.
Align the sound holes with the mouthpiece and glue together with CA glue. The top piece has a part goes to the mouthpiece and the bottom section holes line up with the top holes.
I printed mine in Wood PLA and it sounds great.
Supports are needed for the Mouthpiece at least. I suggest printing all the parts vertically.
The author marked this model as their own original creation.