Well, I tried and failed to tame the Caterham for the Open Series A class races: It's relatively stable at Mugello and Homestead, but the undulations and uneven tarmac of VIR really upset the car.
I decided to spend much of the day finishing the Open Class Tour, since I'd only been through D. I think I had the most fun with the Matra in S Class. It was a car I had mostly forgotten about, but I enjoyed the sound, plus it wasn't too hard to get back under control when it would get "squirrelly", which happens with cars of that vintage. Great fun.
Took the '91 Holden VN that I used for the first race in the Aussie series back down to stock. I had it to C class by the end of that challenge. But back down to it's original D level then got it as close to D400 as I could in preparation for the next D open series. Ran it at Road Atlanta for a test race. It's a really nice car. Handles well and has a great exhaust sound even in stock form.