HMS Unapproachable armoured cruiser-variant (Corrected)

This is my variant version of the HMS Unapproachable fast armoured cruiser. I based my variant design on the specification on page 18 of John Roberts' book, Battlecruisers. If I was to build the ship, I would use turbines and oil fuel, and somewhat lightweight machinery. The armour is quite limited, in that the belt height is just 12ft. It is rather like a more modern heavy cruiser in that respect, except that I felt obligated to make the belt be basically complete. This is the correcte3d version. This is my Springsharp report:

GB/CA/1904, Great Britain Armoured Cruiser laid down 1904 (Engine 1907)

Displacement:
 15,467 t light; 16,263 t standard; 18,200 t normal; 19,750 t full load

Dimensions: Length overall / water x beam x draught
 556.00 ft / 556.00 ft x 75.00 ft x 26.50 ft (normal load)
 169.47 m / 169.47 m x 22.86 m  x 8.08 m

Armament:
      4 - 9.20" / 234 mm guns (2x2 guns), 380.00lbs / 172.37kg shells, 1904 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread
      12 - 9.20" / 234 mm guns (4x3 guns), 380.00lbs / 172.37kg shells, 1904 Model
   Breech loading guns in turrets (on barbettes)
   on side, all amidships
      12 - 4.00" / 102 mm guns in single mounts, 32.00lbs / 14.51kg shells, 1904 Model
   Quick firing guns in casemate mounts 
   on side, evenly spread, all raised mounts
 Weight of broadside 6,464 lbs / 2,932 kg
 Shells per gun, main battery: 110

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 6.00" / 152 mm 380.00 ft / 115.82 m 12.00 ft / 3.66 m
 Ends: 4.00" / 102 mm 176.00 ft / 53.64 m 12.00 ft / 3.66 m
   Main Belt covers 105 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.00" / 25 mm 380.00 ft / 115.82 m 26.00 ft / 7.92 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 8.00" / 203 mm 5.00" / 127 mm  8.00" / 203 mm
 2nd: 8.00" / 203 mm 5.00" / 127 mm  8.00" / 203 mm

   - Armour deck: 2.00" / 51 mm, Conning tower: 8.00" / 203 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 54,077 shp / 40,342 Kw = 25.50 kts
 Range 5,400nm at 15.00 kts
 Bunker at max displacement = 3,487 tons

Complement:
 783 - 1,018

Cost:
 £1.666 million / $6.664 million

Distribution of weights at normal displacement:
 Armament: 827 tons, 4.5 %
 Armour: 4,761 tons, 26.2 %
    - Belts: 1,478 tons, 8.1 %
    - Torpedo bulkhead: 366 tons, 2.0 %
    - Armament: 1,695 tons, 9.3 %
    - Armour Deck: 1,104 tons, 6.1 %
    - Conning Tower: 119 tons, 0.7 %
 Machinery: 3,073 tons, 16.9 %
 Hull, fittings & equipment: 6,807 tons, 37.4 %
 Fuel, ammunition & stores: 2,733 tons, 15.0 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   21,876 lbs / 9,923 Kg = 56.2 x 9.2 " / 234 mm shells or 3.0 torpedoes
 Stability (Unstable if below 1.00): 1.09
 Metacentric height 3.8 ft / 1.2 m
 Roll period: 16.1 seconds
 Steadiness - As gun platform (Average = 50 %): 64 %
   - Recoil effect (Restricted arc if above 1.00): 0.85
 Seaboat quality  (Average = 1.00): 1.29

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.576
 Length to Beam Ratio: 7.41 : 1
 'Natural speed' for length: 23.58 kts
 Power going to wave formation at top speed: 53 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -2.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  28.00 ft / 8.53 m
    - Forecastle (20 %): 25.00 ft / 7.62 m
    - Mid (67 %):  25.00 ft / 7.62 m (17.00 ft / 5.18 m aft of break)
    - Quarterdeck (15 %): 17.00 ft / 5.18 m
    - Stern:  17.00 ft / 5.18 m
    - Average freeboard: 22.60 ft / 6.89 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 122.0 %
  - Above water (accommodation/working, high = better): 165.4 %
 Waterplane Area: 29,833 Square feet or 2,772 Square metres
 Displacement factor (Displacement / loading): 104 %
 Structure weight / hull surface area: 147 lbs/sq ft or 715 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.94
  - Longitudinal: 1.79
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent
 Good seaboat, rides out heavy weather easily