 He also said that the car was over-nervous and highly strung, and that ""It was not a car that Nelson Piquet would have wanted to drive too many more times"" and rated the car as ""Perhaps one of the more disappointing cars I drove"".When questioned about Stewart's findings during practice for the season ending Australian Grand Prix, Peter Warr refused to say what the Scot had reported, only stating that he had correctly identified problems which the team was already trying to fix.Nelson Piquet finished the season in sixth place with 22 points in defense of his title, picking up third places in Brazil, San Marino and Australia.