Quote Originally Posted by jasonfreeland View Post
There is a water cooled design I saw https://www.indiegogo.com/projects/o...t-end#activity that looks to have it beat, but much more complex.
I've seen a few designs with water based cooling, very neat. As pedestrian as water cooling is getting in many computer designs, I'd think this would be soon a very popular method in 3D printing. Though there are other similar methods, like the heat pipe with chemical induced flow for cooling. Separation of the cool and hot within the pipe seems to be the golden path to long life in print extruders.