Hah, I got something right!I pin mine the same way. And also utilize epoxy.
I stain and finish mine with the rifle. Usually matches the rifle pretty well when its done.
I like threaded caps on both ends...not quite historically correct but if I stick a ball, I can attach a T handle to one and and a ball screw to the other. Screw into the ball and then stand on the T handle and pull the rifle up.
As far as tapering, I do as BP does. Chuck it in a drill and coarse paper will take it down quicker than you'd think. Certain times I taper it down pretty far depending on the build. When I have a lot to taper, I'll fit the small cap and then use a knife or scraper and work down the bulk of it to save time.