I either have never seen the white tack mark or noticed it, I'm always figuring out mileage on the fly, its especially tough for the timed races and is most likely the time I will hit the wall, because I'm trying to figure out how much fuel I need.
I think a 3 car race would have been an advantage for me, it seemed like everytime someone would pit they would come out right in front of you so that you had drafting help. I think I ran laps 50-170 without hardly seeing another car. If I was getting close to someone they would pit as soon as I was in drafting range. I remember a couple of times I had a 3-4 second gap on you but then you found a drafting partner and closed that gap quickly.
It seemed like you were quicker at the beginning of the run but I was quicker on worn tires.