I have a 2022 31MB. I had my living room slide repaired over the winter and ever since I received it back, the three pieces of the theater seats move. I looked underneath and found three screws. I put the three screws back in and the chairs moved on the very next trip. I find it hard to believe that there are only three screws holding these chairs in place when there are many holes for each chair. Can someone tell me what length screw I can use that won't push through the bottom of the slide and ruin the floor?