A longer range version of the Ger/CBL/1915 Mod.A design

I have the Ger/CBL/1915 Mod.A photo over my desk at work, and influenced me to try my hand again at a Springsharp design:

This version has a greater range than my previous attempt in April 2007. I was able to raise the range to 5,400nm, rather than 4,500nm. The very lightest machinery weight is required to do that. Frank Fox would probably chide me that a six shaft plant is not feasible on this beam, but I think that there should be a way to make this work. This ship is designed to be able to catch any ship and deliver a quick punch. The ship is intended to fill the "cruiser killer" role (you can buy gear with this pic on it). There are things, such as a cap and a mug (CafePress won't let me link directly, sadly). Anyway, this is the Springsharp report:

Ger/CBL/1915 Mod.A, Germany Light Battlecruiser laid down 1915 (Engine 1950)

Displacement:
 21,985 t light; 22,739 t standard; 24,357 t normal; 25,651 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (805.86 ft / 800.00 ft) x 80.00 ft x (24.00 / 25.01 ft)
 (245.63 m / 243.84 m) x 24.38 m  x (7.32 / 7.62 m)

Armament:
      2 - 12.00" / 305 mm 50.0 cal guns - 915.00lbs / 415.04kg shells, 150 per gun
   Breech loading guns in turret on barbette mount , 1915 Model
   1 x Single mount on centreline, forward deck centre
      12 - 6.00" / 152 mm 50.0 cal guns - 114.33lbs / 51.86kg shells, 150 per gun
   Quick firing guns in deck and hoist mount , 1915 Model
   1 x Single mount on sides, forward deck aft
 Weight of broadside 3,202 lbs / 3,202 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 4.00" / 102 mm 590.00 ft / 179.83 m 12.00 ft / 3.66 m
 Ends: Unarmoured
   Main Belt covers 113 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 6.00" / 152 mm 4.00" / 102 mm  6.00" / 152 mm
 2nd: 3.00" / 76 mm 2.00" / 51 mm  3.00" / 76 mm

   - Armour deck: 2.00" / 51 mm, Conning tower: 6.00" / 152 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 6 shafts, 330,064 shp / 246,228 Kw = 40.00 kts
 Range 5,600nm at 18.00 kts
 Bunker at max displacement = 2,911 tons

Complement:
 974 - 1,267

Cost:
 £3.213 million / $12.851 million

Distribution of weights at normal displacement:
 Armament: 849 tons, 3.5 %
 Armour: 3,293 tons, 13.5 %
    - Belts: 1,159 tons, 4.8 %
    - Torpedo bulkhead: 0 tons, 0.0 %
    - Armament: 364 tons, 1.5 %
    - Armour Deck: 1,660 tons, 6.8 %
    - Conning Tower: 109 tons, 0.4 %
 Machinery: 7,896 tons, 32.4 %
 Hull, fittings & equipment: 10,399 tons, 42.7 %
 Fuel, ammunition & stores: 2,371 tons, 9.7 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   24,285 lbs / 11,016 Kg = 28.1 x 12.0 " / 305 mm shells or 1.9 torpedoes
 Stability (Unstable if below 1.00): 1.20
 Metacentric height 5.0 ft / 1.5 m
 Roll period: 15.0 seconds
 Steadiness - As gun platform (Average = 50 %): 55 %
   - Recoil effect (Restricted arc if above 1.00): 0.34
 Seaboat quality  (Average = 1.00): 1.10

Hull form characteristics:
 Hull has rise forward of midbreak,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.555 / 0.561
 Length to Beam Ratio: 10.00 : 1
 'Natural speed' for length: 28.28 kts
 Power going to wave formation at top speed: 62 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 9.00 degrees
 Stern overhang: -3.00 ft / -0.91 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 25.00 %,  37.00 ft / 11.28 m,  32.00 ft / 9.75 m
    - Forward deck: 38.00 %,  32.00 ft / 9.75 m,  32.00 ft / 9.75 m
    - Aft deck: 22.00 %,  24.00 ft / 7.32 m,  24.00 ft / 7.32 m
    - Quarter deck: 15.00 %,  24.00 ft / 7.32 m,  24.00 ft / 7.32 m
    - Average freeboard:  29.54 ft / 9.00 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 117.9 %
  - Above water (accommodation/working, high = better): 255.1 %
 Waterplane Area: 44,875 Square feet or 4,169 Square metres
 Displacement factor (Displacement / loading): 109 %
 Structure weight / hull surface area: 141 lbs/sq ft or 688 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.95
  - Longitudinal: 1.72
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent