Nano Disc Engine - VerticalNano Disc Manson Guise Engine The Kontax Nano Disc Manson Guise engine features a new and innovative valve arrangement invented by Kontax. The engine has an anodised aluminium construction, with a solid brass heatsink and flywheel rim. the piston comes in either polished brass or enhanced tungsten disulphide coated brass. There are two formats available, one with the flywheel mounted horizontally and the other with the flywheel mounted vertically.