40mm fan intake (made for Printrbot)

These are some intake ducts I designed for a Printrbot Simple Metal, but you should be able to use them on any 40mm fan. I don't expect much in terms of a performance increase from them - I just thought it would look cool, and act as a decent "grill" of sorts for the intake without any adverse effects.

Personally, I prefer the one with the single support arm, but I've provided both!

My exhaust duct is from here:
http://www.thingiverse.com/thing:356001

Please feel free to add pictures o