How to build a Turkey call ( Box Call )

The I've been making butternut boat paddle turkey calls since 1988 and now after over 200 calls, I have it dialed in. I explain the wood and show how I cut, sand and shap it. It's handcrafted so each call is a little different. Out of 10 calls I'll have 2-4 really good ones, then I'll have 2-4 calls that are 0k but not the very best, then I'll have a couple real horrible sounding ones which I'll throw away. My success ratio is slowly improving !