A control housing cover for an internal combustion engine includes an engine block cover portion having a plurality of apertures, an oil separator for blow-by gases integrated into the control housing cover, an engine support plate operable for securing supporting the internal combustion engine in place and wherein the oil separator is arranged neighboring the engine support plate. Furthermore, it has a second layer having a second electrically conductive material, and a monomolecular layer composed of redox-active bispyridinium molecules, which is arranged between the first layer and the second layer. When the rigidifier is in an inverted position, an applied load causes the slits to close and the rigidifier to stiffen. Laminated paint rollers are thereafter made by helically one or two strips of polypropylene or strips made predominantly of polypropylene about a mandrel and applying a layer of adhesive made from polypropylene or predominantly from polypropylene on the strip or strips, and applying a non-porous composite cover material. Also described is interception of at least some TCP acknowledgements and the handling of TCP flow control based on the TCP acknowledgements. An area of the catalyst layer which contacts gas is larger than an area of the permeable layer.