I have a Race Drivin cab (upright). I've been trying to restore it (I've still got a problem with a sticky gas pedal). I knew that Race Drivin was the sequal to Hard Drivin, but I've also discovered that there were prototypes for Street Drivin (which included all the prior tracks and additional cars) and Hard Drivin Airbourne.
Were these ever available as an upgrade? Is is it still possible to upgrade my Race Drivin to one of the later models?