Hi Ghost,
Thanks for the advice.
Because the outer plates really aren't thick enough to hold anything i'll have to use inside the superstructure to make it stronger.
Besides that I also want to be able to turn on and off the lights in individual cabins for sailing at night, so there must be some cabin-structure inside.
Today i've started making the cabins which will strengthen the superstructure, but which will also be easily accessable to show some parts of the interior.
The cabins with interior are chosen such that none of them is blocking the view at another room.
The other cabins will be build together as 4 seperate parts, 1 fixed underneath the port cabins, 1 fixed underneath the starboard cabins, 1 above the port cabins and removeable, and 1 above the starboard cabins and also removeable.
Here are some pics showing the progress:

Tried to make the deck of the dive-area flat again.


Everything ready to start sanding the decks to make them fit inside the superstructure again.

The constructionlot.
To strengthen the superstructure i'll be using the cabins with interior and the cabins with only lights that are underneath the first cabins.

This is the first cabin under construction.

Second cabin under construction as well.
I want to have the cabins in place pretty soon so I can put the bridge deck back in it's place.

Every cabin has a shower and toilet, and here i'm building the first wall of the bathroom.
The bathrooms won't be build, although i'm thinking about fitting 1 with a cloud of steam to hide a speaker which is to make the sound of someone singing while taking a very warm shower.

Here is the second wall of the bathroom.
Greeings Josse