i have a couple of questions if anyone can help... apparently this setup has worked thus far, but i'm wondering if i should make some improvements now that it's my baby... i'm wondering about circulation and ventilation... there's a 4" fan on the side of the box pulling in air and a 3'' fan at the top of the box sucking out air. i attached a filter to the top of the box this weekend and surprisingly the 3" fan is pushing the air through it. however i'm wondering if it would be wiser to swap fans and add a small oscillating fan inside the box?! does this sound wise or should i just leave it be? thanks!

here are more pics... i always forget that talking about this stuff is like talking about a hot chick without pics, which i know is no fun!

1st pic - the cabinet with the doors closed.
2nd pic - doors open with the sealing panel exposed.
3rd pic - the filter.
4th pic = happy times! high five!