Thinking of getting out of my 996 GT3RS and back into an F355. Used to have a Spider, but now want a GTS. So, I drove a '98 GTS at the weekend in pretty foul weather, meaning I had little chance to open the car up...BUT when I did the F1 style scream that I remember from the Spider just wasn't there. I realise a canvas roof/ top off is obviously going to let more noise in, but the GTS just seemed to miss the 355 sound. Is there an option of quietening the sound which the previous owner may have used? Also, the car is from a main dealer but the history shows 6 previous owners and a replaced speedo, so the current reading is 9000 miles off the accumulated 15000. Should I worry ?