RE: Not another 4* 40...
I'm going to reduce the dihedral angle by about 1/2 so I won't be using the stock ply wing joiner. I put shear webs on both sides of the spars between the first 2 ribs on the root end and cut an opening between the spars on the first rib. This creates a pocket for a wing joiner that is the full width of the spars. I'm not sure if I'm going to make the joiner from solid hardwood or laminate so light ply; we'll see.
I got home alittle early this afternoon so I finished the right wing. I built some wing tips and constructed the aileron from sticks. This aileron is 1/4" wider than stock, hopefully this will be an improvement rather than a problem.