Loving RF2 now its on LFM had it for ages but never really played it. I have been advised to change the saturation to 0, what does this actually change in the FFB feel?
I assume you're referring to steering resistance. Many of the profiles have its coefficient and saturation > 0.0 (0.1 mostly I think) which adds extra weight to the wheel, and has caused (or helped cause) some issues with extra noise (graininess) in Fanatec wheels across stints. Setting saturation (or, indeed, the coefficient) to 0.0 removes the effect. So that helps to avoid the Fanatec issue, and gives cleaner FFB as well.
This is the setting on everything that has saturation set it to 0 Brake spring saturation":1, "Brake spring saturation#":"Static spring effect peak force (0.0 to 1.0)",