I used Praiano's tune, and just changed the Final Gear for each track.
Worked great for my Bobs on all the tracks.
...but you have to babysit Bob on the Nurburgring S (not the tune's fault) so he doesn't spin out.
Thanks, ive done the first 3 races and won the first 2 but came 5th on cote d'azur because he kept spinning out on the 3rd or 4th corner and was in last place with 6 laps to go but i babysat him to the end. The tunes definetly helped though