51x51x25mm blower fan holder and duct for Wanhao Duplicator i3

I wanted a bit better fan on my Di3, but i didn't have any 51x51x15mm blower fans at home. But i did have a 25mm thick one, so i made this holder and duct to improve my performance.

Bridge test used: http://www.thingiverse.com/thing:12925/#made