E3D mount for K8200

This is an adapter to mount the **E3D v5** hotend on the K8200 extruder.
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For the *E3D v6* version of this mount, see [here](http://www.thingiverse.com/thing:349095).
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It uses the same long M3 nuts which otherwise mount the original hotend, so there are no further changes to the extruder necesssary to use the E3D v5 in this printer.
Thanks to jangermann, who helped in testing the adapter.