Blower Fan Shroud for PrintrBot Simple 1403

Finally, a fan shroud for the Printrbot that makes use of the advantages of a blower fan! I love my printer, but have been disappointed by its ability to print overhangs. It traced the reason for this back to the fan, which is a pretty anemic 40mm PC fan, designed for high volume and not pressure. it's good for blowing lots of air into a case, but not very good at pushing it through a small space like a fan shroud. A blower fan [like one of these on Amazon](http://www.amazon.com/s/ref=nb_sb_ss_