Robo 3D R1 Double 40 mm fan setup - hexagon hot end

UPDATE: Print in ABS since PLA will tend to warp and sag down beacause of the heat coming up from the hot bed.

So, I found that the other double mounts didn't fit my machine because it seems that the hexagon hot end was raised 1-2 mm in my particular Robo 3D R1 model (purchased August 2015). The other designs were scrapping the build platform.

Specifically I tried this ones:
http://www.thingiverse.com/thing:821080
http://www.thingiverse.com/thing:1026691

I kept the same double mount a