A key part of the learning process, according to Dixon, was switching out of prototype mode just days after winning the Rolex 24 in a Wayne Taylor Racing Cadillac DPi-V.R.
"Especially [compared with] the prototype I was in at Daytona last weekend, how quick it turns initially, in this thing you're putting a lot more lock in," he explained.
"You're braking with ABS. This is the first time I've driven a car with ABS. So there's a lot of different parts that I'm not accustomed to, like how to bleed the brake off.
"Coming down the Mountain is exciting. The first couple of laps you're looking, and you don't see where you're going, especially in the dipper. It was really cool. It's exciting to be here. I just hope I can keep it off the wall."
Dixon was lucky to do that in the final hit-out, with reports of a spin somewhere across the top.
The #27 R-Motorsport Aston finished the day 27th in the combined P1/P2 session – 26th in the lunchtime session and 11th in that final practice.