Hey Tom,
I think I told you a while ago that id post a video of my machine rigid tapping but I dont think I ever did. Ran some little Delrin parts today and figured this would be a good chance since theres no coolant and you can actually see it. Fairly simple part, one end drilled and reamed, other end drilled and tapped with a few different diameter steps, and a threaded cross hole. Rigid tapping and the 4th axis are working great.
See attached pic, and video is here:
Mark