jackiejr
i just got the super cheap air filters not the pleated ones but those that just have the mesh fiber. pull it apart in clumps and position it on the armature, spray the fiber with cheap hair spray and add the foam while sticky. i like the black filter material it just disappears under foam.
i wish i could claim the idea but i got it off another forum from a guy who makes some amazing southern oaks using this method.
hope that answers ur question.