Layer Cooling Fan Bracket for Geeetech Prusa I3

This is a set of items to add a Layer Cooling Fan to a Geeetech Prusa I3 printer or others with similar extruder brackets. The fan duct is not included in these parts. Thanks to AndrewBCN for the inspiration and providing 3 very nice fan ducts. Actually there are 4, but it doesn't look to me like the wrap-around nozzle would work on a dual extruder setup.

Select from the 4 duct styles available at: http://www.thingiverse.com/thing:540716 , Configurable 40mm fan duct / mount for Wade's e