40mm Extruder fan grille (Wanhao Di3/Maker Select)

I was looking at extruder fan grilles for my Maker Select, and considered a few, but they all seemed to have one or another near-fatal flaw. This is my attempt to combine ideas from all the grilles I looked at and solve their flaws.

The hexagon pattern is specifically made with ribs .8mm wide to ensure two nozzle passes using the stock .4mm nozzle, and to restrict a minimum of airflow. Orignially the hex pattern went all the way across, but then I remembered why we use these: to protect the