Yeah Jim I have read that vinigar works really good. Now if you could steam the parts, that should turn stick peices almost to wet noodles. I have seen that done on hard woods and they bend like crazy.
Sheeting the open side of the bottom (center section) wing (new top of bottom).
Carved off the alignment taps from the center section of what is now the bottom of the bottom wing. That is going to need some sanding and puttying. No big deal.
I test the two wings assembled to each other. They are very stiff laterally. There is virtually no give at all when I try to push the top and bottom wing in opposite directions. Much stronger than I expected. I think offsetting the struts top to bottom by one rib bay (2") was the key. Not only does it look better, but it is way stronger for not more than a very few grams of wight. But it sure made it a lot harder to do. Everything became compound angles. Worth it though.
Ken