There are four pieces per side which bridge the gap between the wing and the fuselage. The top piece begins just aft of the skylight and ends at the forward end of the skylight. This is simply a strip that is drilled to both the wing and the fuselage, and also functions to hold the edge of the skylight lexan down. The forward pieces were very hard to build, and I ended up buying a sheet metal shrinker to make them presentable. They extend from the skylight, around the leading edge of the wing, and back to about the main spar on the bottom. The bottom pieces extend from here to the aft edge of the wing skin and have a small angled inboard edge. lastly, I made extensions for the flaps that miss the fuselage by about 1/4" when the flaps are down. They have some irregular inboard edges due to the flap pulleys and cable fairleads that populate that area.