Slow Battleship Study II

I've posted here the fastest Iowa preliminary design previously, now I post one of the slow series of designs, often known as the Slow Iowa which as it's name suggests a much slower version of the actually built Iowas though her armament features the USN's 18" Cannons with a superstructure reminiscent of the South Dakota class battleships a memento of where the Iowa class Battleships originated! The armament could rival that of the mighty Yamato class battleships but her armour was limited to only 375mm Belt and 130mm deck.

The designs had these characteristics:
Dimensions: 243,84 (wl) x 32,97 x 10,96m
Displacement: 45.495tons (standard), 56.595tons (full load)
Armour: 130mm deck and 375mm belt over machinery and magazines
Engines: 130.000shp General Electric Steam Turbines, 4 shafts
Speed: 51km/h (27,5knots)
Armaments:
3x3 18"/48 (457mm) Mark 1 Cannons,
8x2 5"/38 (127mm) Mark 12 Guns,
3-4x4 1,1"/75 (28mm) Mark 1 AA Guns

Data on the main cannons intended for it:
http://navweaps.com/Weapons/WNUS_18-48_mk1.php