Windows on the fuselage
Juice, I added bomb racks to a Royal Corsair I built several years ago. It was completely built. The wire will not have to go through the main spar, it will go out of the wing just ahead of it. Cut a hole in the first rib and a hole in the bottom where the rack will go and just thread it through, it's no problem, even if they are just for looks! I am going to be vac-u-forming a set of Corsair 150 gallon drop tanks that will look cool just hanging on those racks!
On the door thing, you need more info, do you like what I have done?
Luke