DaVinci 1.0 Tilted 50mm Fan Clip-On Curved Front Duct with Support

After using my previous duct (http://www.thingiverse.com/thing:785491) I saw significant improvement on my PLA prints. However, I was still unsatisfied. I still saw occasional spots that could have been avoided with more air flow. Also, when I put my hand over the back side of the fan, I felt air coming out. That's when I decided to change the design a bit to maximize the airflow to the extruder.

1. I tilted the fan to point it more towards the right direction.
2. I curved the duct to be