I own two BR600's and they are my favorite blowers I've ever used by far. We just got in three 600 Magnum's at my municipal job, noticed the different tube but no difference in performance....so what are the differences on the inside? Anything that makes them more fuel efficient or longer lasting? I heard they have two fuel intakes from someone, haven't checked ours at work yet to see? Anyone with some good knowledge on them I'd love to know more!!!