This is a replacement fanduct made for the CR10S-Pro.
Source project can be seen here.
V1 is my first iteration on the project
V2 got a better air tube and dimensions
V3 is a test for the adjustement guide
V4 is the latest version
Please note that depending on your nozzle height the fanduct height could be not perfectly adjusted. If so feel free to copy and modify the onshape project to your needs.