Received the proper screw from Mr. Ferguson today. It is now on the sight bar with a drop of blue loctite and the sight staff is back on the rifle and all is well with this part of the world. A tiny part to be sure but it is right. Fortunately I did the reassembly in my magnetic dish which caught a dropped, nearly microscopic screw and kept me from having to beg for another. Pheww.
Bill thank you so very much for supplying the screw. It is people like you and so many others on this site that give me hope for humanity.
Jerry Liles