Hi Chris,
I drive it with almost default setup and think it's fantastic (almost fastest time at Norisring at the moment). Of course it needs a different driving approach than other cars, maybe try that first. I see many well known ABB drivers immediately tinkering with the setup to make it to their liking and also crashing a lot but I don't think it's necesairy to get fast. I did 4 years of Grand Prix Legends, one of the hardest games and cars ever and that's much harder than this one but it does help to approach it the same way in driving. Careful, don't push it, keep speed in the corners and find a good line first and then go quicker bit by bit.
An exercise I use regularly; drive with no brakes, none at all! And then see how quick you still can be by just finding a good line, work on exits first as you can't work on entries exept finding the right point of turning in.
Going better and faster with default setup is seldom a case of just being good at driving. Yes, some aliens are fastest with default but I'm sure anyone can improve a LOT by just finding the right lines.
If you still want a setup I'm sure there are people who can provide.

In the online folder for Norisring there is at least one called Alpin F3 made by wiege who is as fast as me at the moment , both running completely different sets. I can't drive his but maybe you can.