because of some requests I decided to upload my modified version of mask and filtercover made some small changes like: round holes instead the square ones on the mask that gives then slightly more ridigity on this thin part (thickness 0.6mm)
modified Filter Cover (increased the center tickness to 1.2mm) plus slightly more robust rips with 45deg angle for less stringing when bridging
credit goes to the original designer MrDWGraf
Note: I am not a doctor and cannot give any assurance that this will work. Use it at your own risk.