Tim Grounds "G" Overhauler goose call is one fine, easy to master call.  Very user friendly.  We can tune any of our calls as easy or as hard as the customer needs them to be.  This "G" call has the most finicky guts of all our calls.  I can do 5 other calls in the time it takes to do one of the "G" Overhaulers.   If you take this call apart you will (most likely)  mess up the sound; very touchy.  When you receive it, please leave it intact to assure a fine quality sound.  Always feel free to call our office for advice or information.  618 983 5649