Wow..this took way longer than expected. Lots of measuring and tweaking. I had to open the slots on the upper skins so the flap tracks would have enough clearance. Also had to drill the #40 holes for the Flap Track assy...which was not mentioned in the manual. I feel good about the rivet holes in the spar for the reinforcement angles. Since there we no holes already drilled in the spar I had more flexibility. Painting the parts this evening and will start with the final skin installation tommarow!