The invention relates to a device for damping the pitching of an engine-driven vehicle with a chassis and axles 5, at least one of which is mounted fixedly on the chassis. The two or more kinds of exterior panels have the same outline shape, the same dimensions, and the same surface texture, and, the two or more kinds of exterior panels have respectively a different number, including zero, of grooves on each surface. An end effector is operatively disposed adjacent a distal portion of an elongated shaft of the surgical instrument. The deployment mechanism is configured to drive the deployable member along a central axis and out the distal end of the tubular lead body responsive to rotation of the rotatable member about the central axis.