Deadeye

Once the fuse is cut, try wrapping it around your front half of the wooden frame. You can use the flutes to line up your firewall angle, which should be 90 degrees to the flutes. This gives you 0 degrees of incidence. Now you can take the 2 inch balsa stock, and get your angle for the rear half of the wooden interior. Use the whole 36", as it will be trimmed later. Take some 3 X 1 1/2" 1/8 lite ply or the like to make a gussett where the two balsa stock pieces butt together.