I was considering a bracing issue. I believe several manufacturers use double-thickness of material on the baffle board up front. Realizing of course that the walls can't be too thick .... Is this done to make it solid because much of it is routed out and it's pretty to mout the driver flush? Or is this done because this piece surrounding the drivers is taking a more serious pounding in operation? Or is this done because you need a very thick piece of stock to hang a 30# driver from? I'm hoping to build some light but otherwise unremarkable boxen shortly, and was curious if I needed some additional strength up front. Opinions welcome!