This is a very nice piece of work from "Kulitorum" Thanks man !
I remixed it a little bit to fit it on this Guy´s Diamond Hotend Mount: https://www.thingiverse.com/thing:3025330
Another thing that you will need if you are using that bed leveling Sensor is the Sensor Mount braket. You can find it here: https://www.thingiverse.com/thing:3012269 there is also an "how to" for using Multicolor Hotend (but please note, the tutorial is not complete and also not that easy as it seems, so be careful) its similar to the Diamond Hotend. My own Tutorial can be found here: https://www.thingiverse.com/thing:3370956 In the end it doesn´t matter which Hotend you are using, the modification you will need is the same.
The Fan duct fits perfectly now. The only thing that couldn´t be fixed right now, is the left upper side of the Blower part, this should be mounted by a screw to the Fan above. Theres too less space to place a nut, because of the mounting point for the Sensor. So I get in contact with the Creator of the Diamond Hotend Holder and ask him to make an update for that issue.
Anyway... the rest of 3 screws do the job perfekt and its enough to screw it down.
No Support needed for printing.