I was certain that my D.M Lefever crossbolt had never had a screw turned. But while reading some old DGJ articles on these guns, I was surprised to see the gun I had bought pictured in an article by Oregon gunsmith Keith Kearcher. The stock and trigger plate were removed to show the innards. Mr. Kearcher did not leave the slightest trace that he had ever touched this gun with a screwdriver. It takes both proper tools and proper technique, but it is routinely done by talented smiths, and even careful amateurs who make the effort to do things right.
Agree completely Stan. I just wish more people knew their limitations.