This uses the X-carriage at http://www.thingiverse.com/thing:157992 to mount a 40mm fan for cooling the top of the E3D. The carriage needs an additional hole drilled for the wires from the E3D as shown in the main photo. The hotend is clamped from the side. 2 m3 40mm bolts are used which need a few washers at the top to prevent fouling the large gear.. The filament path is larger to accomodate ptfe tubing for the bowden version of the E3D v6. The print cooling fan is printed in 2 parts which clip together and can be glued after the 4 m3 nuts are placed in their holders.