Lol I know te feeling.
I'm sure I 'lost' the US Spit I did when I lost my drive months ago, explains why I can find all the layers apart from the Sqn ones.
I had done the mid stone/dark earth 'Lady Ellen III' one.
A few tips-
1) The white rectangle under the cockpit carried the names of the Pilot and his ground crew. Alas if you do it because of its location it will appear on both sides, I omitted it.
2) The underside US star will appear on both wings
3) The orange colored patch was something to do with detecting poison gas.
Believe it or not I still have the all the layers for the top one with the 'nude' on it lol.