is it okay to flatten a slightly curved 2x4 against the wall with lag screws?
I'd like a pic but if it's typical construction-garbage grade then I think so.  If you just force it flat with your hand then how much pressure does it take?  If you can do that and it goes flat then once you bolt it down (how thick is your drywall and how long are the lags?) after a year of exposure to the environment in the house it will &quot;warp flat&quot;