Tractor towed ground levelling apparatus includes an elongate cutting edge mounted on a cylindrical steel beam. A digital drive signal generator is adapted to generate a variable digital drive signal for controlling operation of the driver. The first and second ECCs are stored in the redundant area of the page. The drive then maintains a table linking the keys to location of the value. After cleaning and drying the transfer-printed surface, the masking tape and the protective masking tape are removed. The side moulding includes a main body, clips for mounting the main body to the body or door of the motor vehicle, and cushion members provided in a rear surface of the main body.