Early in the video he mentions that he had to put a restriction - 1/16" - in the air intake to keep it from running away. He must be injecting too much fuel. Also looks like a copper line to the injector - and I think he said it's a gas orifice for an injector - so no needle to seal it off? The right sized injection pump, a real nozzle, and it would be great!
And I have to admit - it IS CUTE. I want to build one, only more like full size! Anybody got any plans? Anybody know how much time he spent on it?