Corsair 460X PC case intake filter

I have this excellent case for a month now, and for me, it has a small design failure. The front fan filter got dust
easily... and this makes the case look dirty.

The case take the air by it´s front panel lateral apertures, so i measure them and make a dust filter from these apertures.

For the filter material i used a foam that i bought in a board game/rol store. It´s mainly purpose is to protect small figures
and for separate accesories box in levels.

Each filter uses four foam supp