A duct includes first and second composite duct sections and first and second metallic support ring sections. An ore processor bed receives the ore to be processed. The MCS3P simultaneously produces square wave, Gaussian, and monocycle waveforms by differentiating a sinusoidal source. In yet another embodiment, the training device includes visual indicators. An attachment member is coupled to the mount and has a hook and loop fastener adapted to couple with a pile-type material on a back surface of the vehicle seat back.