When I needed a test stand for a US Engines 41cc engine I knew it would have to be something a lot more substantial than the one I use for my glow fuel engines. What I came up with is a 1/2" iron "L" (angle iron). The face is drilled to the pattern of the radial mount on the US 41, though additional holes could be made for other engines. The engine kill switch is conveniently mounted right on the back of the face of the stand.