Printed with a 0.14mm layer height with a .4mm nozzle.
Painted on Organic tree supports under the Mounting hole:

To help maintain the two connecting ducts internal geometry: "Bridge Infill Direction" should be set to 90deg in OrcaSlicer (its called Bridging Angle in PrusaSlicer) to align the bridging infill parallel to the main inlet splitter across the internal bridges
Layer Immediately before bridging (you can see the little steps i put in in Dark Blue):

Layer with bridging (in light blue) aligned as described:

The author remixed this model.
New ductwork to customize airflow pattern (and get it closer to the nozzle).