Very handy and useful tool for making sure that the chassis and top deck are completely straight after tightening down the top deck screws. This can be seen in the pits of pro- and club racers alike! Use between runs to achieve a perfectly straight car without any unwanted mechanical tweak. The procedure is simple, simply untighten the screws from topdeck and graphite chassis stiffener, place the car with the chassis onto the tweak board, and use the supplied tweak stick to gently push the car down onto the board. Start by tightening down the top and bottom screws (don't use too much force) and work yourself inwards towards the center of the chassis, while still applying a light pressure onto the shock towers with the tweak stick. When done, the chassis will be perfectly straight. Even if the chassis is slightly bent or damaged from a crash, the tweak board can temporarily make the car drivable for a run, if you are out of time to change the damaged parts.