please...ask wayne harris who the first person he ever saw do 150's with 2 regular 10s, 8 years earlier than you did with 2 12s.... i dont have anything to prove anymore, i did it LEGAL in dbdrag before you were out of jr high school. im just trying to help people understand they can build their own boxes (which may be why your reply was so hostile).
...a "waveguide"...??? bwahahaaa. ok. since a 30 hz wave is almost 37 feet long, and 1/4 of that is around 9 feet, i would love to hear about how someone used that in a box for a vehicle in a car.... sorry, but arent you the guy that said the way to set your gains on your amp is to "blend in with the highs of your system" a couple days ago? so, you have no clue on how to properly set a gain on an amp, but youre going to talk about waveguides? whatever...
also, as far as bracing is concerned... youre full of shit. it may not be a common brace, but the enclosure is structurally braced, either by vent, double walls or baffles, or something. a screw into 2 adjacent sides is a brace, strictly speaking.