Fan adapter 140 mm Noctua to 90 mm duct

Needed a silent, 12V duct fan for boat. Forced air heater is not powerful enough to push air to forward cabin. Had a Noctua NF-A14 FLX lying around, so designed an adapter for that. Print 2 of these, put fan in the middle (holes for wires) and splice the 90 mm duct to both ends. 

Needs additional support under the fan screw holes. 

Printed with Creality Ender-3 V3 KE. Used generic PETG - ASA would probably be better for this purpose. 

.f3d archive file included for anyone who would like to remix. 

You can see in the picture earlier revision (smooth surface) and latest revision (fuzzy surface) put together.