I have an old 20ga Ted Williams (High Standard) pump gun with an adjustable choke on a 27 inch barrel. I've checked it out, and it really has no collector value, since it's not labeled as a HS, but as a Ted Williams. It is rather unwieldy for HD use in a small condo. A couple of smiths will cut & crown the barrel for me, but none will attempt to reattach the choke. So, I thought maybe there was a way to tap threads inside a cut barrel to accept Rem choke tubes, to extend the usefulness of my shotgun.