@junklight There is zero chance the production road-legal car has any of the cold jet stuff. Too dangerous, too finicky, too hard to use and maintain, too impractical. Same with the fans like the McMurtry (which is a single seat track focussed car), maybe they do a track-only version with these things, but the typical Tesla Roadster won’t have it. Also, how is it a roadster with a hard top?