Knight and Hale sold a call and cassette tape in a set just a few years ago. I thought it made a lot of sense. I once called in a monster with one of their E-Z Grunter plus, I think it was called. The inhale-exhale type. That deer was SomeThing! But he kept some trees/saplings between us so I didn't get the shot.
I was very impressed with the results -- needless to say.
SS'
