I looked at the back of my Model X P90D and noticed something I hadn't seen before in any of my cars: about 2.5 degrees of negative camber on the rear wheels. With a spirit level tip placed on the innermost rubber rim of the tire (to avoid the wheel and bulge from load), I found the top rim was inboard about 1" over 23" (20" wheels). Both side were the same. Does that seem right to those of you who have had performance cars? Have you observed this on your Model Xs? I suppose that will contribute to shorter tire life. Your thoughts, please?