What a Numpty i am, i glued on the decks and completely forgot about raising the dummy gun port height to the beam level "DOH", my solution was to cut the dummy gun ports so that they are tight in between the ribs and will just need a little tap here and there so they don't fall through and then shaping them to fit the various spaces, i then drilled a hole and stuck in a cocktail stick so i could hold it while fitting, i ended up doing all of them even though the magazine said up to the access door, i can't see them interfering with anything so the numpty might as well just carry on.