Sorry, guys - missed the part about the September date. I was at the races Feb 25 - 27, and was disappointed they didn't show the whole cross section of colors - no reds or yellows.
Found the number thing pretty interesting. The cars didn't have numbers on them when I looked at them in the staging area. They must have been placing the numbers on them near where they picked up the drivers from the introduction area at the finish line.
Couldn't tell who was in which car at first. No numbers on the driver's side, as the cars went right to left to the beginning of the pit lane, then did a 180 onto the front straight. They only had the numbers on the side facing the stands.
Ray