Can't you 'steal' setups from the leaderboard?
On PC you can select a ghost from the leaderboard, and then you can load the setup from that ghost.
Not sure how it works on consoles.
Yes, I play it on PC.
The problem is that only a few of the laps have ghosts on it, i have no idea why.
Usually the first usable ghost is in the 25th-30th place ranking.
What i remember for the Renault is to put downforce at 5 front and 17 back, plus brake bias 65-35, and engine braking at 10. It´s a very tricky car, only driven a few laps, but i´m still not comfortable downshifting and braking, specially from 3rd to 2nd. Top time on PC was a 19´3. I´m still at 22´6, so i need another go trying different setups.