Anycubic i3 Mega Ultrabase part cooling fan duct for E3D V6 hotend

This is remix of llapao's "Anycubic I3 Mega 5015 duct fan cooler ultrabase". I chose the crescent-shaped duct version as it's the most compact design that doesn't obstruct your view & access to the nozzle. So I flattened the crescent duct further to make it work with the E3D v6 hotend, which I had replaced my i3 Mega's standard hotend with. The duct fits the "5015" 50mm x 15mm 12V blower fan (I'm using the "SoundOriginal" brand from Amazon, that can run in variable speed). For best cooling performance, update your firmware with 3D_Rapid_de's 12V Fan0 mod.