MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
allows you to interact with all your printers via the Cloud, and many other exciting new features.

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Hi, I forgot to say I use stock extruder, maybe its not e3dv5 but it fit this part: http://www.thingiverse.com/thing:840452

So with that flat botom plate fited on the extruder, air isnt blowed down

Hotend 40mm Fan duct E3D v5