Looks like a winner, start cutting some wood!
Be careful about hogging the ribs out too much. Nothing substantial will be gained weight wise and open frame designs like this tend to twist and warp easily enough as it is. I would only remove enough wood as is necessary to allow free movement of the lead outs.
The thick airfoil that you show will help build in some strength. Keep it as light as you can, 30 inches worth of wing can add up weightwise quickly every time you get a new idea to add something for strength.
Some of the most clever engineering for lightness and strength can be found with the ARF combat planes being sold by GRS Models. This is the guy who imports the Russian made 1/2A, .15 and .36 sized combat planes.