UPDATE new revision of the file is up, previous version made the fan duct scrap on the frame
This piece is meant to be used with the makergear M2 metal motor mount (flipped), and the e3d v6 fan duct deisgned by Neo Usagi found here: http://www.thingiverse.com/thing:494430
This unit makes up the gap that the motor mound leaves open and evenly distributes the force from the titan to the motor face when installing. Print this in PETG at 100microns and 100% infill for best results.
The carriage mount is for dual v4 users, and maybe single v4 users also. v3b users should be fine without it. Its best printed in PETG at 100 microns, 100% infill and with a 0.25mm nozzle.