I designed this extruder cooler for my Replicator 1 based on one main need: I use a removable glass build plate affixed with springy metal clips. These clips stick up off the build platform and will hit anything slightly lower than the gantry. Because of this, I designed this to shoot a jet of air just below the tip of the nozzle, but keeping the whole apparatus above the base of the gantry. It's designed to not need any additional hardware (other than a 24v 40mm fan) to install.Print Directions: Install Instructions: Fan options: