d-bot core xy fan duct "fang style"

This is a fan duct with opposite tips. In this way the air flow doesn't blow in a single direction but it comes from opposite ways.
Designed for e3d V6 extruder.
I installed a 4020 axial fan. I have to set it at 50%, otherwise I'm not able to reach the desider temperature in the hotend.

The files fits perfectly the original d-bot core xy fan support by Spauda01 (https://www.thingiverse.com/thing:1001065 - https://www.thingiverse.com/download:2142008)