My 2008 Tesla Roadster is in for its three-year service, and I have the option of adding the $3000 Sound Reduction Kit. I drive my Roadster almost exclusively with no top on — with either the hard- or soft-top on the headroom is insufficient for me to sit up straight. (So the soft-top generally lives in the trunk just in case I get caught unexpectedly in the rain — in which case I have to drive home with my head tilted sideways.) Since I drive it almost exclusively with no top on I'm guessing that the $3000 Sound Reduction Kit would make pretty much no difference at all. Does anyone here have any experience with whether the Sound Reduction Kit makes any noticeable difference with no top on?