I remixed this to put it in the O11 Dynamic non XL version. Now there are two fans channeled together in a single duct.
The height is matching if you put the fans on the backside of the mounting point of the case (the side with the PSU in).
I also included the single fan duct if needed. It is not altered only the height is matched for the non XL case.
The rendering of the part might seem odd here. Online there is no rendering of negative volumes. There is no sadly no other version since I did the modification completely in Prusa Slicer.
The author remixed this model.
This version is for two fans and the height is designed for the O11 Dynamic non XL.