Guys, The main problem Mike is having is a bit different than you think.
This is literally a flat plate wing only 3/8 of an inch thick with a 42 inch overall span.
He is asking about grain orientation as it applies to what is essentially a stress skin wing.
If the wing were thick enough so as to be able to use a shear web the 45 deg setup is thought as what is being optional.
But were Mikes wing is so thin he is trying to come up with ways to use the sheathing both to stiffen the wing, and increase the torsional strength, because as it is now flutter is a major issue in his design.
So bending the wood to the airfoil shape is not an issue, coming up with a way to get the most strength both span wise and resisting twisting is.
His spars and alike are limited to 1/4 inch in height so that is all he has to work with, and he is trying to do it in wood as opposed to using exotic materials.