The Brillili belongs to my friend who I am building the plane for. I must admit, that Scott has backed up he product. At first it was a magnito and it did not really work that well. Scott said send the engine back, and he changed it to electronic ignition plus did other mods (improvements especially to the carb attacthment. Since then this engine has run flawlessly. That is why he is putting it in the Yak 54 by GP.