Desk fan shroud with Venturi effect design 200mm variant

120mm fan adapter scaled to work with 200mm fans, This is a scaled version of a noctua desk fan adapter by jackle1127, who describes the model as:

"This is a desk fan shroud design that attempts to emulate the new prototype desk fan design by noctua seen at Computex 2018. This design makes use of the Venturi effect to pull in air from the surrounding area to increase the air flow in one direction. This also helps make the air coming out of the fan more directed and increase the fan's efficien