I know the movie well.My grandfather took me to go see it when it came out.I was five years old.Really made an impression on me as I got older.I first got to fly one of those 17s back in 1991.Now I am rebuilding one of those B-17s with a bunch of guys and we will all be old men when it flys again.
Howvwer I really like your project. What truly astounds me is how Boeing enginnering (et al) did with what they had.
I mean look at the B-17 E-F models, they all had only 4 each 1200hp engines and could range from England to Germany and back with all that payload.