I see different looking Stihl 031's around. Some have a black hand gaurd while others have a whitish hand gaurd. Some have a white and orange handle while others have an all orange handle. I know the electronic 031's have an all orange handle so I assume they are the latest ones. Anyone know the details as to how tell the earliest to latest 031's???? Thanks! I have two with the orange and white handles which I like best as they do not have the stupid AV bushings up near the carb that always seem to be bad.