“During the long day of testing we faced quite a few challenges,” said the Italian.
“There was the rain, I had to learn the car, I had to learn the circuit, and then again had to learn the circuit in the dry because I did not run with slicks until I went out in the dark in the evening.
“Of course it was difficult to negotiate all the braking points and all the different lines in the dark and the last thing I wanted to do was to make mistake and to damage the car.
“Overall I am extremely satisfied with the outcome, with what I have personally learned. I think all that we did was very useful, we were able to complete the programme and bring home a lot of useful information.
“So all in all it was a very positive day for me, the team and BMW M Motorsport – and we will progress from it.”
The #24 BMW Team RLL entry will feature special controls for the double leg amputee's stints behind the wheel, namely a hand-operated brake lever and a throttle ring on a modified steering wheel which will be swapped with a conventional version at driver changes.
The system is similar to that which he used in a guest drive in DTM earlier this year, which yielded a surprise fifth position finish in the second race of the weekend at Misano.
The official Roar Before The 24 pre-race test takes place at Daytona on January 4-6.