Almost three weeks now, not even bowing a little bit.
Honestly, I think the center brace is there for the manufactorer's benefit, as it's the exact same brace on top as the one on bottom, and its cheaper to only buy and stock one part, rather than paying for, and stocking two different braces.
That being said, I'll go gewt the wet vac and put it beside the tank now for when it does break! LOL!