Also, I put mud into the aft crack of the rudder where the two skins come together. I had proseal in there, so I scratched some of it out, sanded it, and cleaned with with MEK to ensure good bonding of the mud. Then I stuck mud in there. I sanded it smooth. It seems to be really stuck in there and improves the rear view of the rudder. It makes it look like one solid end and you can't see the two skins coming together. I hope this holds after painting and flying.
