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)
The short answer is no
By adding a overdraw you are still not changing how long the arrow is on the string which is what makes a bow more forgiving, the longer the arrow is on the string ie short brace the more prone the bow is to hand tourque on the shot.
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
You should be able to come down to an arrow lenght of around 27.75" with your draw lenght with a standard rest unless you are using a flipper style rest that goes in the burger button hole.
I have a 28" draw and I can go down to a 25.5" arrow if need be.