It is most likely far too late to correct the problem Any correction, if possible, would only be temporary. Remember the memory (of a panel in that condition). Can you hand assemble the lead-in-hole components? How will the board be connected to its assembly? Who built the board? Was the laminate purchased to a particular specification?....there is normally a warp and twist requirement. Was the board purchased to a paricular specification that called out warp and twist? Good luck.