Thinking the wing structure...

I have been figuring out how to approach the wing structure so that it will be easy to build and lite yet strong. My initial weight calculations made me think a half a kilo possibly should be saved still in material...and used in glue instead etc. The main problem that I have been eyeballing and thinking is the strong camber/curvature of the top side of the foil...and how to cope with that knowing that +6/-4 G as a goal ( minimum +3.8/-2). also the thickest point is hard to define in the foil and it causes headache due to the spar and spar caps...and attaching the ribs to it within my system. I have a solution to this...I have to draw it now.