I have some squeaky stairs going from the 1st to 2nd floor. Below them is the stairs going down to the basement but the ceiling of the basement is drywalled (not very well). I'm having some work done in the basement that will require some drywalling and my question is: should I take this opportunity to remove the drywall above the basement stairs, fix the main stairs from underneath, and have the contractor fix the ceiling? Or should I just try to fix the stairs from above? Would love any thoughts!