Cool dude, so it's going to be a 4 X 12. Do you know of any schematics available, I've been looking forever. So they just use 3/4 for everything, or do they have sides thicker?? Oh and one more thing, what are the pros and cons of having an open back?? Like a closed back adds more stability, but loses some sound because it's closed??? I forgot to mention I'm using gh12 30's, so it will be 120W. Thanks dude.