I used to have a set of those and they take the same nock that comes with the XX78's. They just don't use the uni bushing.
Yup, that was the idea behind the whole thing. Increases the FOC without the bushing. It's a shame they are not making them anymore. This is the first that I heard. They were my shaft of choice with my compound. Oh well, I really don't shoot it much anymore anyway.