Like me Jack was an alumnus of the gunsmithing program at Trinidad State College, he taught me several of his own innovative kinks when it came to barrel threading. I used these techniques throughout my toolmaking career, none of the other toolmakers had seen threading done the way that Jack did it. Basically it was upside down and backwards, removed the danger of running into a shoulder or the bottom of a blind hole. Once you got used to the set up it became natural, saved me a lot of worry. Jack was distinctive in that he wore a white shop coat, most of his clients called him "Doc" for this reason. The above pics are the first I've ever seen of Jack's conversion.
