Dog hair, dust, and other small bits might get pushed through your extruder compromising, or completely wrecking a print. After designing a couple filters that were simple slotted cups, I wanted something a bit more refined and lightweight. So I modeled this. Has holes to drop in a bit of oil if need be.
Printed as one piece. Should hinge should be loose or break free with minimal force.
Timelapse: https://youtu.be/lVMvGldjXS0