I'm sick to hear of CGI used for the sake of it, especially to change mistakes excessively. Movies are relics of the time and place they were made. I give tribute to the idea that they clever with all of the techniques to make the car fly, that it wasn't one single technique, and that makes me almost happy to be able to see the "flaws" mentioned now, some years on. I'm not against a minimal of mistake correcting in films (like digitally removing the pane of glass separating Harrison Ford from deadly snake in Raiders
) but I love how films back then required a mixture of techniques instead of the CGI one solution fixes all panacea!