Taz Dual V2 Hobbed Bolt Cooler / Filament Guide

I've remixed this super handy filament guide by ADVANCED3DCREATIONS https://www.thingiverse.com/thing:1481508

This guide now includes a fan duct for a 40mm fan that blows air toward the hobbed bolt on the Dual V2 Tool head. I found that this helped mitigate the heat creep from reaching the hobbed bolt - which is one of the most critical flaws in this tool head. You can follow the install directions on the original thing. I had to add a longer screw and nut to help make sure that this mounted