"Are you assuming that the pressure into the grip is 2" above and 2" below centerline thus balancing the bend of the limbs?"
In theory yes, but in practical applicaton probably not. Because the drawing hand is above the bow hand (split fingers) you get a bracing effect on the lower part of the handle as you draw the bow. So less hand contact may be needed here, but because of that bracing effect, both limbs feel equal strain. So perhaps it'll take 1" below and 2" above centerline to balance both limbs. Who really knows. One thing for certain though when it comes to wood bows, if you don't evenly strain both limbs, time is not on your side. Of course, just my opinion here now. ART