What I have found is that our FFRs are hard to get the corner balance as perfect as we would like. This is mainly due to the 150-250# driver sitting in the left rear of the car. The empty car is rear heavy by 2-3% but w/ the driver you end up w/ a car that is rear heavy and left heavy. If you try to get the front tires equal (which would be best for braking) you end up w/ the left side more rear heavy than the right side. My goal is to have about the same front to rear difference on both sides. I will fudge that a little to get the fronts a bit more equal.