Antoni,
I noticed your setup and Ryan's are quite similar albeit the rear end. You go for silver springs and lighter gear diff oil whereas Ryan has the harder pink springs and heavier gear diff oil. In the end are they fairly similar in terms on/off power steering?
It really is track dependant, but now we are both using almost the same setup. The different springs and oil combo's give a different feel, a softer rear spring wil give more low speed rotation (a heavier diff will also do this), and same for a harder rear spring and light oil (more stable). Guess you just have to test and see what you prefer, everyone drives different. Although Ryan has been stealing my idea's of late