There is provided an assembly for modifying a surface of a workpiece, where the assembly is responsive to a plurality of control signals. A combustion andor gasification device includes at least one combustion or gasification chamber and a grate with at least two grate zones which are arranged in a longitudinal direction of the grate. Receiver brackets are attached to the frame rail of the vehicle, and the receiver brackets have two alignment notches that are sized to receive the two tabs of the fuel tank support brackets to couple the fuel tank to the vehicle for later permanent attachment, particularly at a subsequent assembly line station. Methods for producing and using the foams are also provided.