minimal J-head bracket bowden extruder

I have modified this design
http://www.thingiverse.com/thing:26817
I love the mini-size j-head bracket, but I wanted to use a bigger fan to coll down both the hotend and the printed pieces.
For this purpose I used this fanduct for 40mm fan http://www.thingiverse.com/thing:389013
it work nice and fine :D

Tested with a J-head for 3mm filament with my big coreXY.
The original design is for the Prusa i3 :)
The single j-head mount has hole for the standard prusa i3 single plate carriage.

I the scad file there's a code for double bracket for double j-head hotend mount.
To mount the double bracket you need to print the "bar" too.
It's all included in the scad file.
I have tested only the single bracket. Let me know if you print the double.

It designed to use pneumatic fit with 1/8 threaded nut.