Dual E3D V6 (or clone) fan duct

Firstly, thanks to Chris Leamon by provide STEP file.

Distance between hotends (center to center) = 27.5 mm ;
Diameter for Z probe = 13 mm;
M3 screws and nuts.

Fusion 360 file is available.

Layer fan: https://www.thingiverse.com/thing:2375978

Update 1: Added holes to allow assembly of layer fan.