The CF deck stiffener before I trim it back to ~1" flanges. It was a little dry so the peel ply print-thru is incomplete. But I only need 5 feet out of a 6 foot piece. It is an ugly under deck part. It will look better when I trim it, honest! But it rings like a bell when you tap it.
And the balsa core in the main deck. In a rough cut tank inspection hatch that I inherited.