Hi there, apologies for the delay! This is such a great reference image for doing a study like this and you've done a pretty good job at it I'd say! Value studies aren't an exact science, but when I squint my eyes and look at this image, I would say the side of the cockpit would also be counted into the darker spectrum, as well as parts of the front and the roof. I hope this helps and keep up the great work! c: | Artwod Feedback