This is a part cooling system "concept" that uses two parallel aluminum tubes with small holes to direct air flow. It has evolved from a circular tube I designed 3 years ago (very similar to the excellent Berd Air system) but is mostly printable and uses a stock 25mm fan for air rather than a noisy (and expensive) air pump.
The TuskDrillJig is a printable jig used to properly align the holes for an E3D V6 hot end - with sock as you can see in the photos. The BGM mount is here: https://www.thingiverse.com/thing:2445640
Rather than describe assembly here, I've already blogged all the details: http://www.sublimelayers.com/2017/03/the-tusk-fan-shroud.html