I have decided to take Thomas-W's advice and build a manifold on my door to house (4) Fi IB3 18's on the top and make 2 slot ports on the bottom out of the rectangles already there. The door is 1.25" thick, I will make a template/face of the entire door adding .75" to the thickness. I'll make a 25"x25" panel to plug the ports so I can run true IB as well. Here is a pic he suggested for me. I will begin tearing the Twin Towers down tomorrow and use the wood to build the manifolds and ports. It w