BCN3D+ 1.75mm mod

With this mod you will be able to use any J-Head extruder with your [BCN3D+](http://www.bcn3dtechnologies.com/) by BCN3D Technologies.

- you will need to fit the fan to your specific hotend, here some options: [1](http://www.thingiverse.com/thing:340312/#files), [2](http://www.thingiverse.com/thing:354723), [3](http://www.thingiverse.com/thing:400441), [4](http://www.thingiverse.com/thing:943181), [5](http://www.thingiverse.com/thing:931140)
- my hotend is 5mm longer (compared to the origi