out of curiosity, I had heard that a jong needs to be made out of a single trunk of wood, and that it enables it to have a certain resonance that pvc, composites, or that stacked discs of wood jong would not have. Vibrations from striking are absorbed back into the body, and a jong that does not resonate would-I don't know, what? Resonate incorrectly? Not that there isn't a such thing as different resonation from different woods-that's why honduras mahogany, brazillian rosewood,swamp ash, alder, etc are chosen for guitars. Each wood resonates, responds, breathes differently and affects tone, sustain, etc.
"My Gung-Fu may not be Your Gung-Fu.
Gwok-Si, Gwok-Faht"
"I will not be part of the generation
that killed Kung-Fu."
....step.