I've got a custom call from Kaiser Calls and also have a M.A.D. Super Crystal that is similiar in sound. That M.A.D. super crystal allows me to get about as close to sounding like a raspy sex crazed hen than any other I've tried and it makes me look like a better turkey hunter than I am!! I just had Andy make me a Kaiser call last year and haven't had a chance to take it hunting but it sounds great and that zebra wood is really cool looking as well. Andy was really nice too and got the call done for me in a timely manner. Here is link to his website!!
http://www.kaiserkalls.com/