Waldown produced two versions in terms of the fitting of chucks. A stub or JT6 where the chuck attaches directly, or the Morse taper which I believe is a number 2. You can also insert Morse taper Shank drills directly without a chuck in that model. They take different spindles but I believe the same quill. The Morse taper protrudes out of the head and has less workspace as a result.
I think Ray changed his over in that thread.