This, I also force a ton of air from my diaphragm rather than just from my throat. I sound pretty good , but a buddy of mine sounds identical to a turkey
Ther was a guy at the NWTF convention showed me how.
Turn the call so whats usually against the roof of your mouth facing away from your face with back side of the tape poked between your upper lip & teeth.
Let the reeds lay across your lower lip (mite have to hold in place with your fingers), then say tucka, tucka, tucka.