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 specially to acquire maximum traction and great steering characteristics at the same time. The initial top deck flex settings enables effortless modification with this flex between 4 different faculties. The utmost effective deck are from the engine mount using these alternatives: 1.) smooth setting - No bushing or bearing can be used. This enables maximum flex and maximum steering. Nevertheless the automobile is less stable on-power. 2.) Soft-medium environment - the very best deck is linked to the engine mount via ball bearing. This environment eliminates some steering but improves security. 3.) moderate environment - the most truly 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 engine install via unique screws M3x5.5mm behind plus inside front component of layshaft. This environment provides maximum protection and improves steering reaction.