Wanhao Duplicator i3 V2 Fan Cooler V1.0

This is my attempt to create a localised cooler for the Wanhao Duplicator i3 V2. This is a work in progress and my first attempt to upload something to thingiverse.

It was inspired by TiDiPi's fan cooler for the i3 V1 http://www.thingiverse.com/thing:881566

Please let me know what you think.

Update 17th Dec:
This initial test printed okay, but when the fan is running there is not enough airflow through the end holes because the low pressure air from the fan needs larger holes to flow t