In hindsight I would move my lower braces up another inch or so and keep them off center like that just to be sure. Those subs are 5 inches deep with magnet. Also on the long side im only putting 2 staggered as that’s the most ridgid side and ive still gotta install some egg crate foam. It’s plenty stout already. Can’t freaking wait to at least get this powered up. Im thinking locating inside subs where I want them then marking and drilling bolt pattern, sticking bolts then threading on bottom subs onto bolt stems, that’s probably gonna be a 2 person job.