I wanted to try the "Cooling Duct That Works!" by doctek on my Kossel with E3D-v6 hotend so I remixed this part with "E3D v6 hotend complete mount (with groove) for Kossel mini 3D printer" by gtrick90.
The result is a grooved mount with a way to mount the cooling duct.
You will need the cooling duct and one (or more) of the link parts from doctec's thing.
I found that the Kossel Effector from gtrick90's thing was 1mm too thick (at least according to the official drawings of the E3D-v6) and as a result I had to file down the groove mount to be able to fit it on my printer.
Uploaded a modified version of the effector that is 7mm thick instead of 8mm, for a better fit.
The cooling duct was not spot-on in the center around the hot-end, so I uploaded a new version of the grooved mount where the mounting part for the duct have an offset of 2mm to the left.
Let me know if this works better for you as well :-)
An easy print, no support needed.