Filter holder for 92mm fan

I made this to use a charcoal filter to hopefully absorb some of the noxious odors when I print with ABS. It just circulates the air inside the enclosure through the filter. I used some 3.5" square filters about 1/4" thick that are sold as compost bin odor absorber.

I started with an OpenSCAD customizable fan grill then added some walls and tabs to allow for a slide-in activated charcoal filter. The tabs are 45 degree slopes so they should print without support.

I printed it then used s