Canted Cooling Fan Shroud for 40mm Fan

**Update:** I recently upgraded my hotend to a genuine E3D-V6 Full Metal Hot End. I found that using the 40mm Noctua fan was insufficient to prevent heat creep. There were three symptoms that cleared once I installed the 30mm fan which was supplied in the E3D-V6 kit.
- A faint clicking sound that came from the hot end during the retraction prime of the extruder.
- Under extrusion after a lengthy travel. Even though there was no stringing or oozing.
- Over extrusion following the under extrusi