Skin, why do I over think everything.

The new delimia... which way? I have read all type of posts and possibly know the answer to my madness. I started messing with skins last night. I have some 1/8" birch and some good ole luan.
I placed my ribs 12" centers. I was looking to see how sturdy it was using 1/8". It actually seemed ok but maybe little more flex than I really want. I can go double layer and get what I want. Gluing and water protection will prob remove additional flex. Case solved, right? Nope
I have a couple sheets of luan laying around, yes, box store. I cut one of them to fit and tried it out. It had no flex and was solid. I like the feel but it will take some persuasion. I left it in a bind overnight and getting it to bend but looks like a few more humidity and temperature changes and it might get there.
Wanting to ask the pros... What would you do? Stay with 1/8" and double layer or be patient bend the luan. Lamaination has been an issue with Luan but now I will have to laminate the 1/8". Cost is not really that big of a concern it will end up costing about $100 more.
As always, Thanks for all the advice.
BTW I will be using .040 aluminum

I placed my ribs 12" centers. I was looking to see how sturdy it was using 1/8". It actually seemed ok but maybe little more flex than I really want. I can go double layer and get what I want. Gluing and water protection will prob remove additional flex. Case solved, right? Nope
I have a couple sheets of luan laying around, yes, box store. I cut one of them to fit and tried it out. It had no flex and was solid. I like the feel but it will take some persuasion. I left it in a bind overnight and getting it to bend but looks like a few more humidity and temperature changes and it might get there.
Wanting to ask the pros... What would you do? Stay with 1/8" and double layer or be patient bend the luan. Lamaination has been an issue with Luan but now I will have to laminate the 1/8". Cost is not really that big of a concern it will end up costing about $100 more.
As always, Thanks for all the advice.
BTW I will be using .040 aluminum