Delightful little ships. I love them.
The only thing I might change is to drive down the upper edges of your beam doors. I'm the wrong kind of engineer, but I
assume the helo deck would continue forward as the upper member of the ship's box beam. It would be stiffer and stronger to leave this deck unaffected from beam to beam, and to leave a foot or so of the ship's side shell along this deck. I think the openings could probably be moved and resized while keeping their utility ultimately unaffected.