I have my G25 at 540 degrees.
In LFS the wheel turn is set to 620, so all cars have slightly less lock than they are meant to, but the MRT has only a little less than its meant to. Thats why I set it to 620 as opposed to 720 or 540.
Wheel comp is 0.01, as IIRC if this is 0, all cars have the same lock (540) which is not what I want, at least this is what used to happen.