Call a Sightron Technician, they have always been happy to answer my questions.wolfman said:I discovered the other day that one of three set screws is missing from the windage turret on my SIII 10-50. I have 1/8th turrets. Can anyone tell me if the screws securing the 1/8th turrets are the saem size as those securing Sightron 1/4th turrets?