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That's great that your using ACWest's duct! What is new here for you is the updated Hero Me Gen3 Base. His ducts will be updated with longer mount pegs to take advantage of the longer channels to give a broader range of height control (for more types of hot-ends that are taller), as well as add strength to the duct when mounted on the base (now there are mount screw points on the front pegs). If you are happy with what you have now, then wait for the next iteration.