Separate antler air channels

My complete assembly file containing among other parts the separated antler air-duct. All parts are modified to my best knowledge. I removed the Minda/Pinda-arm because it's an unnecessary complication. For the printfan I added an air intake guide. The antler-duct needs no supports. The used connection screw is M2.5 x 5.
Update: There now is a 2nd E3D-version for the Revo Micro upgrade bracket now using the original Prusa 3-wire hot-end-fan. For those who use the original E3D 2-wire hot-end-fan shipped with the Revo Micro a new problem arises with the newly issued Prusa Mini firmware-version 4.4.0. This firmware-version will not recognize a 2-wire fan and assume the hot-end-fan is not working. The printer will do a panic reboot and display a preheat error. Possibly you can switch off the hot-end fan check: (Prusa: Since this is a safety feature, it is turned ON by default. In case you don't want to use it, you can turn it off in Menu -> Settings -> Fan Check).
I solved this problem by changing the standard E3D-2-wire-fan to this type: SUNON GM0503PEB1-8 (3-wire) ( https://de.aliexpress.com/item/1005003238233642.html). 
I printed a new fan holder similar to the E3D-fan holder but with adapted dimensions to accommodate the new 30x30x6.8mm fan (see files). After that I installed the 4.4.0-firmware successfully. The advantage of this solution is that the revolutions of the hot-end-fan can now be controlled again by the firmware (3-wires) and the weight of this solution is lower than the new E3D-bracket version with original 40mm Prusa hot-end-fan (overkill for the Revo Micro). The Sunon-fan is extremely quiet and inexpensive.