Hi Dan,
I see now your fantastic job on another italian subject. It's all right, your work with paper is at higher level.
The only "mistakes", and you are not guilty, were made by the producer of the kit.
The italian one had the "St. George and the dragon" shield only on starboard side of the fuselage, nothing on port.
The "Balilla" fuselage was covered on sides by only one continue sheet of wood, not cut in pieces as the model is printed. Same on upper decking behind pilot. The "divisions" were only a line of little nails to fixing the sheet to the internal structure.
I was one of the member of the team that restored original 16553, I saw it dismantled for restoration.
Hope to see your models finished, you made great work also on complex system of rigging.
Roberto