I was toiling whether I should call this post “Landen’s Latest Screw-Up.” After I installed the supports, I noticed that the plywood was warped slightly. Only about a quarter inch, but enough to screw with alignment.
To remedy this, I first poured warm water on the convex side of the board (sorry for the misaligned photo).
Once one side was completely covered, I screwed some scrap 2-by-4’s to the bottom to straighten it.
I will soak again it in a couple more days. Once that dries, it should be good to go, maybe before Tuesday. Just thought I should let you guys know how to ward against improperly stored plywood, so it does not get regarded as a waste.