Spent a lot of time today ensuring that the cowl lines and nosebowl is straight and square. Made shims from .040 x 1.5 aluminum sheet for the cowl stiffeners. Drilled and riveted two on each side to the stiffener. The rivets were simply to keep the shims aligned for the screws and camlocs. I then trial fit the lower cowl again and trimmed where it will meet the stiffener. Then laid out and drilled holes that will accept the nutplates.