I’m adding a floating vanity here that is supported by this metal bar (hung for reference) but it only reaches one stud https://imgur.com/a/Zpd36i3 so I want to add some support. While I have the wall open, should I add some flat 2x4s like drafted and if so what’s the best way to attach them? If not, what would be better because I need an extra \~3” on the right and \~2” on the left if I were to sister it, so I would have to do double on each. #home