Raise3D N2 heat shield and fan mount

This is a combination heat shield and fan mount for the Raise3D N2/N2 Plus. This version only works with the V2 head. This is a remix of the excellent front fan mount by Sylus:
http://www.thingiverse.com/thing:2102446


I got tired of having to remove my insulation wrappers around the hotends every time I wanted to change nozzles, so I designed this heat shield. It effectively blocks the hotend heat from affecting your prints, while also providing a fan.

To change nozzles without any d