That looks much nicer than the one I made to a similar design. However, I don't use it much. The main problem is that I don't have enough clearance between the chuck and the cross slide for the base, let alone for the rotating part, so I can't work close to the chuck. As a result I can only use it for parts being cut from large bars that are stiff enough to stick out from the chuck a ways. It might be more useful on a larger machine.
However, I did make a little table for the rotating part, so it can double as a rounding table
Simon