A new version of the "Ger/CB/1905 Flush-Decked" design

I have a new version of my Ger/CB/1905 Flush-Decked Design. This depends on having lightweight machinery to work, as well as oil fuel. Still, the concept seems to work fairly well. The concept dates from the early 1970's and included a pencil sketch. My photo dates from April 2005. This is the Springsharp report:

Ger/CB/1905 Flush Deck, Germany Battlecruiser laid down 1905 (Engine 1921)

Displacement:
 19,048 t light; 19,917 t standard; 21,432 t normal; 22,644 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (562.00 ft / 560.00 ft) x 94.00 ft x (25.00 / 26.13 ft)
 (171.30 m / 170.69 m) x 28.65 m  x (7.62 / 7.97 m)

Armament:
      8 - 12.00" / 305 mm 45.0 cal guns - 850.00lbs / 385.55kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts, 1905 Model
   4 x Twin mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
      12 - 6.00" / 152 mm 45.0 cal guns - 100.00lbs / 45.36kg shells, 150 per gun
   Breech loading guns in casemate mounts, 1905 Model
   12 x Single mounts on sides amidships
      Weight of broadside 8,000 lbs / 3,629 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 10.0" / 254 mm 375.00 ft / 114.30 m 8.00 ft / 2.44 m
 Ends: Unarmoured
 Upper: 7.00" / 178 mm 375.00 ft / 114.30 m 8.00 ft / 2.44 m
   Main Belt covers 103 % of normal length

   - Torpedo Bulkhead:
  3.00" / 76 mm 375.00 ft / 114.30 m 25.00 ft / 7.62 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 9.00" / 229 mm 7.00" / 178 mm  9.00" / 229 mm
 2nd: 6.00" / 152 mm 4.00" / 102 mm  6.00" / 152 mm

   - Armoured deck - multiple decks: 3.00" / 76 mm For and Aft decks
 Forecastle: 3.00" / 76 mm  Quarter deck: 3.00" / 76 mm

   - Conning towers: Forward 9.00" / 229 mm,  Aft 0.00" / 0 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 77,901 shp / 58,114 Kw = 27.00 kts
 Range 5,600nm at 16.00 kts
 Bunker at max displacement = 2,727 tons

Complement:
 885 - 1,151

Cost:
 £1.755 million / $7.019 million

Distribution of weights at normal displacement:
 Armament: 1,434 tons, 6.7 %
 Armour: 7,277 tons, 34.0 %
    - Belts: 2,228 tons, 10.4 %
    - Torpedo bulkhead: 1,041 tons, 4.9 %
    - Armament: 1,764 tons, 8.2 %
    - Armour Deck: 2,094 tons, 9.8 %
    - Conning Tower: 150 tons, 0.7 %
 Machinery: 2,683 tons, 12.5 %
 Hull, fittings & equipment: 7,655 tons, 35.7 %
 Fuel, ammunition & stores: 2,384 tons, 11.1 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   34,490 lbs / 15,645 Kg = 39.9 x 12.0 " / 305 mm shells or 6.3 torpedoes
 Stability (Unstable if below 1.00): 1.29
 Metacentric height 7.2 ft / 2.2 m
 Roll period: 14.7 seconds
 Steadiness - As gun platform (Average = 50 %): 51 %
   - Recoil effect (Restricted arc if above 1.00): 0.38
 Seaboat quality  (Average = 1.00): 1.02

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.570 / 0.576
 Length to Beam Ratio: 5.96 : 1
 'Natural speed' for length: 23.66 kts
 Power going to wave formation at top speed: 58 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 0.00 degrees
 Stern overhang: 2.00 ft / 0.61 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  27.00 ft / 8.23 m,  24.00 ft / 7.32 m
    - Forward deck: 30.00 %,  24.00 ft / 7.32 m,  20.00 ft / 6.10 m
    - Aft deck: 35.00 %,  20.00 ft / 6.10 m,  18.00 ft / 5.49 m
    - Quarter deck: 15.00 %,  18.00 ft / 5.49 m,  18.00 ft / 5.49 m
    - Average freeboard:  20.99 ft / 6.40 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 90.4 %
  - Above water (accommodation/working, high = better): 164.2 %
 Waterplane Area: 37,433 Square feet or 3,478 Square metres
 Displacement factor (Displacement / loading): 110 %
 Structure weight / hull surface area: 161 lbs/sq ft or 785 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.94
  - Longitudinal: 1.75
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent