The XB8'21 framework features a locking system the servo saver articles that guarantees the elements will stay guaranteed even during framework flex in extreme conditions. The gas tank had been relocated rearwards for improved fat security. The framework fits both SOFT and ROUGH 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 could without impacting energy or rigidity.