Thanks, that makes sense. I have my inner lid off, just wasn't sure if I would be able to wiggle a board in there. Did you manage to get screws into it on all four sides?Gremlyn, i had to take the seal stripping off, when i did that i saw some plugs that held a molded piece of plastic to the lid perimeter. Once i pulled those pugs off i was able to get the board in there. I Cut the boar 1/8 bigger on all sides so i could get it in the hole, yet not pop out easily. So, i cut the board 1/4" wider and taller than the hole. I then had to angle the board to get it in.