Blower duct for MakerFarm i3v print cooler

Variation of darco's 50mm blower duct optimized to be used with a Delta BVB0512VHD-SP01 radial blower mounted to the left side of the X-carriage on MakerFarm i3v series printers. Makes a great print cooling system for the i3v.

More information on the i3v print cooler approach can be found at http://3dprintboard.com/showthread.php?3461-MakerFarm-8-quot-i3v-Prusa-build-by-Printbus&p=26657&viewfull=1#post26657