FLSUN cube 5015 fan duct for MoonDoctor's X-Carriage

I very much liked MoonDoctor's concept of a modular x-carriage but didn't have the same components, so I made my own. This is the fan duct I came up with.

There are two version here. Both fit MoonDoctor's x-carriage https://www.thingiverse.com/thing:2553911

But, one goes with my stick hot end mount for it: https://www.thingiverse.com/thing:2885421
One goes with my Chimera mount for it: https://www.thingiverse.com/thing:2995894

They may work with other mounts if the nozzles are the sa