OK Rangeball, use "effective" if you want. The change has the same "effect" as if your bow just grew more reflex. Anyhow, I never intended to argue over semantics or the concept in general. I was just hoping there were members here who had either done this or knew more about it. Thanks for the replies.

I will check with my buddy who is both an engineer and a woodworker, but unfortunately, only a gun hunter. If he is unsure about a shim or spacer, I'll just get him to make a replica grip from the stock one, with the extra wood needed to move the neck back.