The XB8'21 framework features a locking system the servo saver posts that ensures the components will remain secured even during chassis flex in extreme conditions. The fuel tank ended up being moved rearwards for improved weight balance. The framework fits both SOFT and INTENSE 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 after which anodized to make it since light as you are able to without impacting energy or rigidity.