Unique top deck enables modification of longitudinal flex. You will find three longitudinal flex possibilities: top deck with tightened nut, top deck with loosened nut, or no top deck. As a result of this new flex adjustment function, the automobile can be easily set for different traction conditions or tires. The utmost effective deck with tightened nut eliminates longitudinal chassis flex and makes the automobile easier to drive in high-traction conditions or whenever softer tires are employed. The most truly effective deck increases steering response, but at precisely the same time is more forgiving as it makes the automobile more exact. The top deck with loosened nut is a compromise between little and lots of longitudinal flex. This setting is preferred on moderate traction conditions as it makes the steering response a bit less but improves mid-corner steering and provides better on/off power feeling. Making use of no top deck is preferred for low-traction tracks because it provides greatest mid-corner steering. The most effective deck features also hole which allows mounting the surprise adaptor once the long-shock configuration is used.