[rjohnsonnm]

I had the same problem a couple years ago. You are on the right track now that you've lifted the unit and got the old stuff out. I junked all of the old stuff and replaced the soft board with an oak board. Drilled holes in the new teflon blocks. I didn't even try to use the old plastic cover that was attached to the board. Instead, I bought a plastic rain gutter downspout from Lowes and cut it lengthwise so one side was a little wide than the other. I used that as the white facade (Used white screws to put it on). Hope this makes some kind of sense.
Ron