I bought the Hornady neck turning tool sometime back. Never liked using it much, it's setup to work with an electric drill and the thing gets kind of clumsy. I had it mounted to my bench and the whole thing worked as designed, but was just plain clutzy.
Thought about building a vertical "L frame" type mount to set it up in my drill press...nah, too much effort.
Then I got the idea to take it apart, remove all the good parts from the frame, and mounted those in my lathe, shell holder stem in the tailstock and cutter assembly in a 3 jaw chuck. Sometimes the light isn't as bright as it should be...just too simple to have not seen at first I guess.
This works like a charm. It's actually a pleasure to run, and much faster, without all the fiddling around. You do have to turn the lathe off to adjust the cutter depth, but that's no big deal. Once set, you can leave it on for the duration.
Chris