maybe i am trying to out think myself here.
I know brace height is measured from the string to the center of the riser and the longer that distance is the better it covers flaws in form ect.(more forgiving)
now technically the arrow rest is located very near the center of the riser and in my thinking if you add an overdraw and move the rest closer to the string wouldnt that technically be the same as shooting a bow with a shorter brace height and make for a less forgiving bow,because the arrow rest isnt actually where it is supposed to be (in the center of the riser)

I am asking because my draw lenght is 29.5 inches and i have to use at least a 30.5 inch arrow right now i am using 31" arrows and if i go to an overdraw of 2 to 3 inches i can shorten my arrow length to a 28-29" inch arrow and be able to shoot an arrow that has a lower spine deflection and is lighter. but i dont want to end up with a less forgiving bow.