There was lash on the few I grabbed when I took the valve covers off before I saw the metal which started all this. I guess if the valve would have moved I would not have had any lash, right? How can tell if the retainer has moved? There is always a chance there was some error on setup but I do use a height mic. Just curious if there is a combo between pilot error and some retainer movement. I may stick a different retainer on it and see if the measurement is the same.