E3D v6 CFD optimized adjustable part cooling duct

Update Oct 29, 2019: Added STEP and IGES source files.

Adjustable part cooling duct for E3D v6 with 5015 fan blower.

**I'd love to see your make - please publish :)**
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The air flow has been CFD optimized ensuring equal air distribution into three areas: before, below and behind the nozzle.

The part cooling duct should be positioned 1-2 mm higher than nozzle end. The height can be adjusted in 1mm steps.

The clip is derived form on my other design: https://www.thingiverse.com/thing:3590309

Printing:
Clip - for the best strength print clip in original horizontal orientation - requires support.
Nozzle duct - print flat, no supports
Link - print flat, no supports

Material: PET-G or ABS
Layer height: 0.2 mm

Parts:
1 x 5015 fan blower
2 x M3 20 mm bolt
2 x M3 7-10 mm bolt
1 x M3 30 mm bolt or 2x zip ties
5 x M3 nut

Assemble:
1. Make sure 'link' slides into 'clip' with some resistance, but easy enough to allow ad