How Does Your C7 Track Down the Road

I probably have close to 1/2 million miles on Corvettes which were C3, C4, C5's. I put over 172,000 miles on the C5.

I'm very familiar with suspensions and alignment, as on all the cars that I road raced, I have the manual equipment for alignment and I did them.

It was apparent with my 2015 C7 it was pulling very slightly to the right when on the right side of the road, and it would track straight when on the left side of the road. Because of the crown of most roads, the car should pull slightly to the left on the left side. In most cases, unless there is more crown than normal, a well set up car should track straight no matter what side of the road it's on.

With a 4000 mile trip planned, I called my dealer and said that on the way out on my trip, I would like to stop there and have the alignment checked. He said fine.

With car loaded, I stopped in and then they told me that because I only had 325 miles on the car, GM would not cover an alignment until the car had 500 miles on it and the suspension had a chance to settle. Finally with the stipulation that if the car started to pull the other way after it had accumulated more miles, I would have to pay to correct it.
I agreed, and it went on the alignment rack.
They found the left caster was off 1/2', and made the correction. This seemed in my mind enough to correct the problem.

5 miles from the dealer I was on the Interstate and on my way to Florida.

Soon became apparent that the car was pulling to the right no matter what side of the road I was on. Soon began to wonder if my wrists would hold out for 4000 miles of this.
Also became apparent as the miles accumulated, that sometimes the car was just fine, then it would return to the right pull even though the crown appeared to same in all cases.
For example, once I reached I-75 in Florida, car was perfect, but a few miles before it was not.

All my race cars were 4 wheel independent, and the most critical adjustment was the fact that the rear had to have toe-in, or it would be unstable. Am beginning to wonder if I might have this problem.

My questions are;
1. How does your C7 track? My C5 didn't seem to care, it would track straight unless the road was grooved from the 18 wheelers, and the wide tires did not like that
2. Has anyone experienced my problems, and was it corrected?

I'll be back home next week and am looking for information to pass on to the dealer, who by the way to this point had been most co-operative.

BTW, when the car was tracking straight on I-75, yes, it is a much better handling car than the C5.

Thanks
Jack