I think we're going to need a lot more info on your structural concepts to give any real advice.
I don't think anyone would try to build a wing of that shape and have it externally braced, so I'm assuming you're going the Bede route and having a large alloy tube main spar.
Although this seemed like a good idea from Bede at the time, using a large diameter alloy tube with fibreglass skins (BD-4 etc) worked until they decided to skin the wing with aluminium.
The problem now was that the tube spar was capable of flexing more than the skin sheeting, and caused buckling of the skins.
Putting thicker skins tended to negate the reason for the tube spar, as the skins now did most of the work, and concentrate the loads at the root of the spar.
Watch the wing in this vid;
<https://www.youtube.com/watch?v=bu9jpREQ56A>
Better to design a propper 'D' cell wing.