Lulzbot TAZ Fan Dual Duct

Aleph Objects has come out with a nifty fan kit to upgrade TAZ 3 and older printers, and comes standard on the TAZ 4. The original factory design of the duct only blows on the build. This is great for improving bridge capability, but fails to address one of the shortcomings of the Budaschnozzle design, which is the fact the it only has passive cooling above the hot end itself with fixed heat sinks. PLA in particular tends to get stuck in there due to heat creep up the 3mm filament. This addresse