Here I have tried both versions of attaching the railings to the deck. The back one is glued on and worked as expected.
The front version is the removable one. I have insert slots on the extended part that go under the deck and then I have tabs tab hold the sides of the railing in position. It does what it should and if you plan on making a small fleet of these ships and want to store them safely, I would take this option.
If you only want to make one hero model I would glue the railings on and do all the detailing :-)

For now I will focus on the deck structures, the towers and house and then I can start building my final "hero" builds.
Happy building,
Chris