I almost to the point where i will be gluing the wing skins onto the foam core halves... the plans called for a specific amount of dihedral, which isnt built into the foam cores.....


It would probably be best i sand in the dihedral into the cores before the wing halves are sheeted? or should i do all of that work after they are sheeted? this is my first jobber like this

You can do it either way. You can cut the cores with a hot wire if you do it before sheeting and that might be a bit easier.