steps 1-7 = photo instructable
step 8 = video instructable
Step 1: Parts Layout
+ about an inch of 7/8" or 15/16" dowel rod.
+ a saw, a drill, a file, tinsnips.
Step 2: Piece 1, pvc jaws
Step 4: Piece 3, pipe
flatten out any hanging edges with a file.
Step 5: Assemble the three pieces. debugging tips.
put the pvc-jaws over the end of the pvc with the woodstopper. Push the woodstopper and pvc-jaws around so that a proper gap is in place.
Blow into the recorder. It should sound like a recorder.
The recorder might not work on the first toot. If so, mess with the placement of the wood-stopper and pvc jaw on the long pipe - The air hole size is crucial for a working wind instrument. tinker and test!
Also, use a file to smooth (don't "round") the edges of the wood stopper and pvc. Smoother surfaces make for better air flow over the surfaces.
If the woodstopper is moving around too much inside the pvc tube, stick some duct tape on the stopper to widen the stopper.
in my experience, tinkering just to get sound shouldn't take more than a few minutes.