My extruder velleman K8200 Use aluminum frame and E3D


used, the stability of the aluminum frame.
you can move the horizontal frame in the middle of the vertical frame.
simply changing fillement.
easily switch from 3 mm to 1.75 fillement by changing the base block (1,75 mm block in development)
used the aluminum frame as an additional cooling.

what is the advantage of this one VS the standard extruder?
i get the advantage of the E3D.