About this 3D model

Annular cooling duct for Robo3d printer with stock j-head hot end. (The new one comes with the hexagon hot end this is not designed for that but if someone wants to print it and check the fitting I can make an adjusted version to fit. Or for the E3D v5 and v6) Designed for 50mm fan for increased airflow(stock fan is 40mm) Please check the instructions :EDIT: I've added files for and adjusted version that should fit with the E3D V6. I'm printing them now will adjust the files depending of the results :EDIT 2: I've noticed the bracket tends to sag, causing the duct to drag on prints. I've included a new version of the bracket with a clip that holds it more securely to the x-carriage Inspired by: Fan duct to M90 v12mm by Aleksxx http://www.thingiverse.com/thing:379541