Very interesting information.

I have some small input on the subject. I have a newly completed L4P that was done using Carbon everywhere. All seams, firewall noise wheel well, Cowlings, noise gear doors, wing ribs, AND wing fillets. As it turns out the wing fillets were a mistake because this is a place where you need flexibility. After several high altitude fights were I saw up to 5.2 psi one fillet cracked from the fuselage blowing out about 1/4 to 3/8 of an inch toward the wing and the fillet must flex to take up that movement. Fiberglass is better used in this application. I now have a crack in the paint next to the bonded joint where it should flex.
Every material has it's place.

Jim Hergert
N6XE, "An Sex Y" L4P
103 hrs.