Okay I went to motoman 393 page and there were many suggestions as to how to disable the acv. I chose #2 in order to stay with the stock 75 PAJ. According to procedures for this mod you must plug the vaccum port hole. Can anyone tell me which hole this is? Is it the one with the O-ring or is it the one with the trap door that the pin on the rubber diaphragm pushes in on or is it the one just to the right of that? Thanks.