Ender 3 Control Box Fan Cover Plate

Fed up with bits of filament falling into the control box fan on your Ender 3? Me too, so I designed this. The air inlets are on the side of a slimline 'rotunda'. I also took the opportunity to print some text on the cover plate that shows which way to turn the bed-levelling knobs to make it tighter or looser (which makes more sense to me than the up or down marked on the adjustment wheels). To fit this, you'll need to replace the two front screws with longer ones. I only had 10mm M3 available,