Hello, I hope I can clarify my question, I have recently off this site a acceleration body manual of a Nissan Pick Up where I found a contradiction in number three of the image that I send them says the following: Be sure to put the mark at the central point of the roller as illustrated in the next black point says: If necessary, adjust the screw to until the end of the cam this is the center of the roller . real. Figure Figure marked with red the points to be reviewed.