That's some good stuff! Thanks for posting SE. A few years ago I heard Matt Van Cise in a contest and thought he had that distinct two note yelp sounding way better than 95%of the real hens in the woods. He sounded like he had a box call in his mouth. I have been trying to duplicate that since. It's very easy to let the rasp overtake the notes.
Great pointers! You have a very realistic yelp as well. Thanks for the help.