The X4 top deck features milled holes for unique tweak-free top deck screws and works together with the guts layshaft location within the framework. Machined from 2.0mm graphite product, the look of top deck is performed particularly to obtain maximum traction and great steering traits at exactly the same time. The original top deck flex settings enables effortless modification with this specific flex between 4 different characteristics. The most effective deck are from the engine mount utilizing these alternatives: 1.) smooth setting - No bushing or bearing can be used. This allows optimum flex and optimum steering. But the vehicle is less stable on-power. 2.) Soft-medium environment - the most effective deck is linked to the motor mount via ball bearing. This environment eliminates some steering but improves security. 3.) moderate environment - the most effective deck is through the motor install via unique screw M3x5.5mm behind layshaft. This environment eliminates some steering but improves stability. 4.) rigid setting - top deck is with this motor install via unique screws M3x5.5mm behind plus inside front component of layshaft. This environment provides maximum security and improves steering reaction.