Finished assembing the wall and started laying down the foam. I have 2 extra slats in the wall by error and am going to pull one out at the far end, but im dont want to pull the other out in the near end since the foam is installed there and secured. So when done i will have one extra slat in my wall which is an error. Manual says it will fail, but does anyone have experience, can i get away with 1 extra slat? The wall feels real sturdy.