2015 Sunhokey Prusa i3 extruder heatsink cooling duct

This is the first part I designed to improve my 3D printing. It increased airflow around the Bowden extruder heatsink to make sure the heat from the hotend won't reach to the upper body which will soften the filament and causing blocks.

One of the attached pictures shows the bump caused by extra heat from the hot end.

Note: I designed this part in solidworks. Wasn't sure which side should be the first layer. So you need to turn 270 degree on Y axis when you do slicing. (To sit the fan moun