Simon's fan duct

Utilises cheaply available VGA fans that cost less than a buck each and provides essential cooling at the hot end delivery barrel to aid printing with PLA. If you want to print big you are going to need one of these. This was inspired JaydmDigital's excellent fan duct for a 40mm fan

This is designed for the front fan mount on my twin fan x-carriages, you only need the one :)

Requires one 12 volt VGA fan like this one: http://tinyurl.com/cwkvphm