Well, next week I am probably going to start working on my *Final* box for my Blueprint 1803. I am going to go with a 14cuft box tuned to 18hz. The enclosure will be a sonotube 24" in diameter and about 6 feet tall. That should come out to around 18.8 cubic feet, but after the port and driver displacements, along with the endcaps will probably be pretty close to 14 cubic feet. For the port, I was thinking about making a square port out of MDF, 10 inches by 10 inches inner diameter, around 55 inches long. Will I get any port noise with this? The port displacement is over 3cubic foot!!! For the endcaps I was thinking 3 layers of .75 inch thick MDF. Do I really need 3 layers, or would 2 suffice? I need to be able to transport this thing!!! I will be using a Behringer Feedback Destroyer for equilization. Surely some of you have built a similar box! Anyone have a webpage with pictures? I need to do a *perfect* job on this, since the materials will probably cost me around 100 dollars! Also, how do those of you who build sonosubs cut out the driver and port holes? Do you do this before laminating the 3 endcaps or after? My guess is before. Ill post a picture of my planned enclosure... Thanks guys!