Dean, you need to post some pics if possible. It never occured to me about the cockpit collecting fuel and oil but I can see that it would. Mine has just a little bit less dihedral than the plans call for, maybe 1/8" each tip. A while back I started joining all my wing halves by making the root ribs on each panel thicker, like 3/16" or so, glueing them perpendicular to the board like the other ribs and sanding a bevel into each one. I just like this method better than glueing the root ribs at an angle to form the dihedral. On this plane I didn't quite sand enough bevel so I got a bit less dihedral. Anyway, I can't wait to fly it.