the problem is that its incorrect spring rates, the fronts are heaver to combat the weight shifted under hard braking and cornering, hence why its a bad idea to run soft spring rates at the fronts an vice versa, thats why u will see the spring rates at the fronts aways stiffer than the rears, hence F12 R8

But thats not to say its wrong, i see a few drifters run stiffer rear to allow for more over steer