The Big Blue 360 Complete Twin Fan Cooling Duct is back.
This Fan Cooling Duct allows longer bridging and has been tested up 100mm in any direction. Can be used with One or Two Fans as is your wish.
I'm not sure if the wiring Diagram has been updated on the RepRap Instructions site, but when wiring in a 12V LED to tell me when the Extruder Heater was on, I found that they had mixed up the Heater wires.... Not that it matters unless your wiring in a LED.... But I did inform them, and they were supposed to be updating the wiring diagram for the Duet.