Onestringer:
To answer your question, the Widow is cut 3/16" past center at the strike plate. That will place the center of an 11/32 dia shaft dead center of the limbs of the bow. With that setup the arrow shaft does not need to go through much paradox, If you don't increase spine the shaft it will shoot weak or to the right for a RH shooter. One thing to be concerned about with smaller dia. carbon shafts the center of the shaft will actually be past center of the limbs, so as O.L. said you might need to move the strike plate out some, so it at least is in the center of the shaft. Or by moving it farther out so its less than center, you will be able to shoot less spine.
Bob