Just another tip:

11) Do NOT bend or twist the actual frame, unless it is a custom call made by yourself or someone you can personally contact. After contacting most of the major call manufacturers, they all strongly advise against bending the frames. Bending the frame places/removes tension from the reeds. This can drastically change the call, in particular bending can cause multiple reeds to "touch" and distort. In essence, take Black Warriors first advice and find a call that fits (either by sizing or trimming). Don't take his advice on bending...[&:]...although I myself have done it in the past with both good and horrible results.

S&R