Cooling funnel

You will need to drill and tap two M4 holes in the printer head bracket to fix the cooling funnel.
The fan is a DAOKAI® 2 Pieces 12V 40*40*10mm Cooling Fan for 3D printer Parts Reprap Prusa I3 purchased from Amazon.
There is a spare 12V fan connection in the board which you will need Mini Micro Jst 2.0 Ph 3 Pin Connector Plug Male With 150mm Cable & Female purchased from Amazon (you may need some cable to connect them) just use the black and yellow leads remove the red one.
The fan is installed with 4 x M4 screws and nuts.
The fan works well when printing thin wall sections. I did fit a switch to turn it off when printing thicker parts but to be honest it was a waste of time and so I have just left it on.