Well, my attempt above wasn't very successful. Unless someone likes to read. . . But audio books are useful, modern music I would just as soon avoid and work in (relative) silence.
What I was trying for was a photo of a tapping head. On eBay, it was listed as a "tupping" head. I don't think it's complete, but haven't fully unpackaged it yet. I don't need one, but the price was pretty good at <$30 plus shipping. The MT-2 input shaft has been cut down to a 1/2 inch straight shaft. I can use it in the big drill press. The premise of a tapping head is based on a planetary gear assembly, which is what I was really buying. If my idea doesn't pan out, I can always peddle it out as a nonworking tapping head.
.