O.K., this might sound like a stupid question but does anybody know what the single screw on the side of the PRW ring is for. One side of the ring has 2 screws for mounting it to the base (tightens the metal claw), but there is another single screw on the other side of the ring which seems to hold the cross-bolt in place. Should this screw be tightened when installing or is this some sort of windage adjustment???? Should I just keep this screw as tight as it will go?
thanks
thanks