I had the plan for quite some time but never got around to it, until a member of a FB-group brought it up. Others have done it before--some time ago you could even buy a whistle with a Sweetone mouthpiece and straight bore metal body from TWZ. So I thought I'll give it a shot.
In the first experiment I simply took the body of a Waltons "mellow D" because it has a wider barrell. I wrapped some sticky tape around the barrel and stuck the Sweetone head on it. Worked like a charm but it was no perfect fit. So I made two bodies from PVC--the first one had tuning issues as it was just a quick and dirty job. Made another one today and this time it plays gorgeously. Insanely agile whistle, snappy ornaments, in-tune cross-fingered C nat--it performs better than any plastic whistle I have bought so far. And it was a fun little experiment. I used a small insert in the head to bring the octaves in tune since it is now a wide-bore whistle and without the insert the 2nd octave was flat -- bigger holes might have solved this, as Chuck Tilbury told me, but it would have made it louder. The 2nd octave is also less loud with the insert. It is still a bit louder than with the original body but it plays so much better and finally I can use the fantastic mouthpiece of the Sweetone and got rid of the annoying seam of the rolled-tin barrel.
