BCN3D+ Bowden Layer Fan Duct

Alternative design for the Layer Fan in the BCN3D+ with bowden (http://www.thingiverse.com/thing:428226). This design concentrate the air in an small surface rather than in a ring like the original one.
NOTICE: this design haven't been tested with the original BCN3D+ carriage setup and there is a possibility of interferences with other parts.