I have a performance Center 625 of recent vintage. The rear sight came loose. The horizontal adjustment seems to have two screws, one on the right that is used to adjust the horizontal aim, and a screw or fastener of some type on the left that looks like a knife thin split screwdriver head, that keeps the horizontal sight together. Any idea what is needed for the left side? I have a driver for the right side.
Feel free to correct me if I have this wrong.