Thanks all....Used the Trevor method.With the elevation screw removed, just lined it all up, and with a Craftman Nylon faced hammer, just whacked the heck out of it. Had it so just the forearm was on a hard dining room table top ( the lady was not home...)..Hope I left no evidence..Anyway, that sight is not going to move.
Both ideas are perfect because they work.
Again, thank you to Robert and Trevor. This is what Forums are all about.