Regarding the Tron disk/disks, I think you will find that the two rubber stickers are each placed on two disks (a circle spinning one way, within an outer ring spinning the opposite way).  The reason you see the two red light circles on Tron, is that one red light is coming out of the gap between the inner circle and the outer ring, and the other red light is coming out from the out edge of the outer ring.  Does anyone have a Tron to confirm it has one or two spinning disks?