There are 3 distinctive aviars: No bead, small bead, and big bead. The star Aviar is a no bead, the star Aviar driver is a big bead. The pro Aviars (at least the first runs) are big beads. I think the KC (11x at least) is a small bead. Not sure about the JK's. And I think, over time, there has been a dx run of all 3, so you're better off inspecting the bottom.