The XB8'21 framework features a locking system the servo saver articles that guarantees sun and rain will always be guaranteed also during framework flex in extreme conditions. The gas tank had been relocated rearwards for improved fat security. The framework fits both SOFT and HARSH composite radio containers without chassis modification. The chassis is CNC-machined from 3mm top-quality Swiss 7075 T6 aluminum; strategically machined in low-stress areas and anodized to make it since light you can without impacting energy or rigidity.