reversing the arms puts the front wheels forward hence putting more weight towards the rear, giving more traction. Shave the bumps on the inside and outside of the suspension arms, place 1 mm shims to replace the removed material behind the c-hub and inner arm, to bring the front wheels more front. Add 50 grams of wieght in the rear of the car. 40 wieght rear oil-1.6 spring.....40 wieght front oil 4.0 springs. and watch it fly