This is an interesting post. We have a mighty Demon that we got just before they "went out of business." The carb has not worked right since we got it. It will not idle correctly and using that new idle screw in the top of the carb does not do anything. When I have had it apart I have found things that did not make any sense, including trash, metal inside one of the fuel bowls. I and several others have attempted to make it work correctly. I talked with a "representative of Demon Carburators" at the PRI show and he asked that I contact him and discuss the problems. I sent him an email, as shown on his card, and to date I have not heard from him. The motor is being freshened up right now and I am not sure after reading this post that I will deal with this Demon much longer.