Dual Hotend Extruders with E3D mount for Vertex k8400

Improvement Idea:
The idea is to modify the vertex k8400 3d printer with this frame and mount the existing extruder's and stepper motors on to it. The reason for doing so is:
* To be able to use E3D hotends.
* For use of flexible filaments. (that needs to pull, not push the material)

Specifications
* Nozzle distance approximately 36 mm (standard approx. 23.7 mm).
* There should not be any big change in distance from the nozzles and the printing platform,
but pleas be careful so you don