XRAY X1 Aluminum Body Post Plate. This optional body post plate is compatible with the X1 and X1 2016 vehicles. This plate allows you to use a variety of front wings, without changing the position of the body post, eliminating the need to cut multiple post holes for different wings. The plate is 4mm high, which is the same distance as between pin holes in the body post. This means you must lower the pin by 1 hole position when using this plate.