Wanhao D6 / Monoprice ultimate improved fan duct

This is a upgraded fan duct for the existing fan in a Wanhao duplicator 6 or Monoprice maker ultimate. It is designed to use the existing screws and fan for minimal change.

After looking around a bit I found http://www.thingiverse.com/thing:1826526 which had everything I will be looking for when I eventually do a dual fan setup and included the original 123D file to be able to make modifications. I modified it to remove the second fan and connector pieces. I also noticed that the areas whe