That one's on my to-do list. I got a moderately difficult wins in the Gallardo and the Golf VI R10. I had to work on the gearing in the Golf to get it competitve as it maxes out at 564pp with flat floor. It was more fun, too.
Edit 9/15 I did a basic tune for the Reventon and got a win. I wimped out with TC 1, but embraced the drift nature of the beast and pretty much did the whole race with massive powerslides. I got a win with an overall time of 11:00.7xx. Fast laps were in the 2:07-2:08 range. I didn't even add a transmission.
I've held off posting this because I have so far not been able to get my camera co-operate with windows 10 in order to post the pic, but I'll keep trying. I did save the replay but thats not uploading either.