Great job. I thought about doing that one after seeing some video of the Bailey's 300 and searching his website. My only suggestion would be to make the contingencies larger. Look forward to seeing more.
As for ratings, everyone has their own ways of doing them. Generally, I'll have pretty high ratings (low & high) for front-running cars. Somewhere around high-80's to almost maxed at 100. Mid-pack cars probably from 60 to 85. And, I always keep my aero consistent since these cars must conform to templates and there's little leeway otherwise.. I use 75 low and 80 high, I think. .gns physics don't have great drafting characteristics like the .cts physics. Plus, these cars are fairly sleek and low...and don't generate much draft anyways.
A fair amount of painters don't rate their cars. I do, plus include crews.
