Hi Bruce,
An example of my latest work is posted in the knifemaker's gallery, title "New Bowie". That knife has a finial nut, although it's not clearly shown. I don't think it takes a lot of skill to run the tang through the handle and thread a nut on the end. I take a piece of steel, drill and tap, and thread. With luck, it goes down nice and tight. But more than likely, the buttplate will have a slant, and one edge of the nut will be higher than the other. With the proper amount of fiddling, I get it fixed, down, and tight. Once this is done, I start to shape, and here's where I need improvement. I just can't get that cool, neatly shaped look (unless I just go with a round ball shape).
Bobby, yes, I saw Kyle's video too. I never even knew you could use a lathe to shape metal, I've always seen it used on wood. In any case, I don't have a lathe.
I admit to feeling a little foolish asking this question, but I bet other guys have struggled with this too. Haha, if everyone comes back and says Gosh, I never had that problem, I'll just have to hide for awhile
Dave