Printrbot Simple 1405 Fan Duct

Fan duct for the Printrbot Simple 1405 edition. This replaces the two wooden fan mount tabs and provides much better air flow than the printable fan shroud uploaded by Printrbot. This part also provides stabilization for the extruder motor and adds some stiffness to the front of the Y axis assembly. The design accepts the original mounting screws and provides two additional holes for 10mm long lower fan mount screws, but they are not really necessary.

V0.4 Updated with slot for zip-tie cabl