Da Vinci 2.0 Cooling Fan Snap on

This cooling fan shroud is a better design than my previous one that tried to go behind the back of the tool head. This one is printed in two parts that snap together. I may make some changes to this. Suggestions are welcome.
See this thread for more information
http://voltivo.com/forum/davinci-firmware/239-cooling-fans-for-extruded-plastic-and-the-tool-head

This piece is a redesign from another thing.
http://www.thingiverse.com/thing:433148

UPDATE!!! I have added a modifi