The wing foam core is shaped for you, and ready to be sheeted. What you do is basically glue the carbon fiber strips and wood onto it with epoxy resin. You weight it down (or vacuum bag it) till dry. I also add a few strips of 2oz fiberglass cloth to the trailing edge (inside with the foam) to make a very stiff and thin trailing edge. Once you pull the sheeted wing out, add the servo mounts and controls and you finish it with covering film or glass and paint. Scott Hartman has a couple of great build threads showing how to do that on the NMPRA site in the building tips section. I would suggest viewing them. It really is pretty easy, but it does require a few evenings to complete.

If you have the time and skills, you will have a much stronger and better product than an ARF can provde you with IMHO.

Have fun!