This is an optional XRAY T4 2017 Aluminum Servo Mount. This CNC-machined central servo mount is made from Swiss 7075 T6, and is attached to the chassis with 3 screws (instead of previous 2) for better durability and to help eliminate servo movement in hard crashes.
The mount is now positioned in the absolute center of the chassis for perfectly-balanced flex characteristics. The mount also includes an extra hole for an inline chassis reinforcement brace.
The servo mount includes an extra hole where the battery backstop screw can be mounted, allowing additional adjustment for battery width.