Prior to starting the major construction of the hull, etc I was working behind the scenes on a lot of "fiddly bits" which included (in addition to the armament) the periscopes, various antennae, bridge binoculars, etc.
By working like this, little by little, I build up a collection of little "sub- models" (no pun intended) . That way, the "fiddly bits" are done long before the project really taxes the patien(ce)t.
So, here I present the bits/pieces of the conning tower, prior to assembly.
Periscope tube nest is paper.
Periscopes, antennae etc are mixed media ("whatever works") .
I am a "mixed media modeler"...so there!
For ladders, etc I use Grandt Line
* Grandt Line Products home page model railroad detail products. I cant see well enough to bend wire that fine...
MTF
Jim