Good call making that post-haste! That cardboard is no bueno!
Looks like it'll last forever!
I feel you pain about using up the "sacred" plywood stash, night/day difference.
I had to make 24 "project" trays for the wife's glass work a while back that slid into slots (center area) Used up a lot of my stash of red oak strips, but she was thrilled.
