Ender 3 main board fan guard

thingiverse

Modified the original part to make the cross sectional areas of the two openings closer in size (bottom: 1.49in^2 and front: 0.94in^2). Instead of a ratio of <1/2 between the front and bottom, the front is now ~2/3 of the bottom opening. This is probably an entirely unnecessary change, but should improve airflow through the guard and it still has clearance to the bed leveling screws.