Please refer mainly to the original Satsana cooling duct that this thing is remixed from;
If you change your hotend on your Ender 3/Ender 3 Pro to a microswiss all-metal-hotend, you'll notice that the original Satsana cooling duct sits too high, whereby the cooling outlets are partially blocked by the silicon sock on the new hotend - which in turn creates severe part cooling problems.
I remixed the original Satsana to incorporate 'adjustable height' slots where the duct mounts to the plate - I also took a little bit out of the sides so that the new height clears the eccentric nut on the bottom roller, and also took a little bit out of the side to allow the cabling to come up freely and cleanly from the hotend up to the top of the carriage.
Print it in the orientation that the part is set to, (flat to the plate), with supports TOUCHING BUILDPLATE ONLY.
This is a continuation of the Satsana design that also allows for the use of all existing parts on your ender 3 (screws, etc) so that you do not have to source bigger ones.
Let me know if theres anything else that you'd like to see!