Upgrading the Franken-CR10S to use the new Hemera In this post I'm going to talk a bit about my migration away from the dual E3D Volcano setup I've been using on my Frankensteined CR10S and over to the Hemera from E3D. This is notable for me for a couple of reasons. First, the dual extrusion setup is less optimal than I liked, it worked most of the time but was always a hassle to get working properly and too many variable to go wrong.