E3D bowden to stock Black-Widow extruder

* replaced the stl with the v2 version. (fits better to the extruder)
the v1 will fit with a little bit sanding and is printing great :)

this is a remix of Leparti83´s E3D mount. i have modified it a little to use it with bowden hotends. you can screw in the adapter where normaly the ptfe-coupling is so maybe other hotends will fit also.
You can insert a ptfe-tube inside but i dont know if it is necessary.
i will try this in the coming week at a friends black widow :)
this version is for