what a joke if that is the case... if the jetting, powervalves (I agree, you probably don't need one on the carb), sqirters, acc pumps are all the same, etc... what is it excatly that they (bigs) are doing??? I am not an expert, but if the main components are Proform stock parts, then I would think Bigs has some explaining to do... those components are the tuning basics of any carb, so if they are the same, they must be putting pixie dust on it.