Dual E3D hot end upgrade for Mankati Fullscale XT

OBSOLETE version.
EDIT: please use this instead http://www.thingiverse.com/thing:295495
Just installed this double E3D hotend on my Fullscale XT.
Double printing pleasure.
It is like a puzzle to mount this, if there is no hurry, please wait for the redesigned mount that fixes more easily directly to the crossbars.