forward hole= smoothns out steering response-car reacts smoothly-better suited for smooth flowing tracks or high speed turns
rear hole= • Quickens initial steering response• Car reacts faster to steering input• Better suited to small, tight tracks
On the sp2 I have 3 holes and run the middle, if its a tight track then I'll move it back towards the car.
Remember, when you move or change one thing, it will effect other things, like camber and or caster angles.