Wing bone call

I took a friend of mine hunting this weekend. As a small thank you he had made me a wing bone call. This is what our ancestors made and used to call turkeys back in the day. I had seen them but never used one before. I did not realize it was that difficult to use. I have made my mouth sore, but finally got the hang of the thing now and it sounds damn good. The old timers say that a wing bone caller is the most realistic call ever, and more realistic than high $$ commercial calls.
To me this old school stuff intrigues me.
Ill take pictures later