An extremely large battlecruiser: the Ger/CB/1943

The largest caliber guns allowed by Springsharp are 22in guns. I would like to use 24in guns, as the Germans built larger guns. The used an 80cm gun to attack Russian positions in the Crimea, I believe. In any case, I probed the limits of what are feasible with Springsharp with the Ger/CB/1941 design. This is an amazing ship that can make 35 knots and cruise for 15,000nm at 17 knots. This is the Springsharp report:

Ger/CB/1943 Very Large, Germany Battlecruiser laid down 1943

Displacement:
 253,110 t light; 262,391 t standard; 281,121 t normal; 296,105 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (1,514.57 ft / 1,500.00 ft) x 256.00 ft x (39.00 / 40.70 ft)
 (461.64 m / 457.20 m) x 78.03 m  x (11.89 / 12.40 m)

Armament:
      9 - 22.00" / 559 mm 50.0 cal guns - 5,650.00lbs / 2,562.80kg shells, 120 per gun
   Breech loading guns in turret on barbette mounts , 1943 Model
   9 x Triple mounts on centreline ends, majority forward
  3 raised mounts - superfiring
      16 - 6.00" / 152 mm 55.0 cal guns - 116.57lbs / 52.88kg shells, 180 per gun
   Quick firing guns in turret on barbette mount , 1943 Model
   1 x Twin mount on sides amidships
      24 - 4.00" / 102 mm 50.0 cal guns - 33.88lbs / 15.37kg shells, 150 per gun
   Anti-air guns in deck and hoist mounts , 1943 Model
   12 x Twin mounts on sides, evenly spread
  12 raised mounts
      64 - 1.46" / 37.0 mm 60.0 cal guns - 1.69lbs / 0.77kg shells, 240 per gun
   Breech loading guns in deck mounts , 1943 Model
   32 x Twin mounts on sides, evenly spread
  24 raised mounts
 Weight of broadside 53,637 lbs / 53,637 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 19.0" / 483 mm 980.00 ft / 298.70 m 16.00 ft / 4.88 m
 Ends: Unarmoured
   Main Belt covers 101 % of normal length

   - Torpedo Bulkhead:
  8.00" / 203 mm 980.00 ft / 298.70 m 39.00 ft / 11.89 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 20.0" / 508 mm 14.0" / 356 mm  20.0" / 508 mm
 2nd: 6.00" / 152 mm 4.00" / 102 mm  6.00" / 152 mm
 3rd: 1.00" / 25 mm       -   1.00" / 25 mm

   - Armour deck: 8.00" / 203 mm, Conning tower: 20.00" / 508 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 10 shafts, 716,023 shp / 534,153 Kw = 35.00 kts
 Range 15,000nm at 17.00 kts
 Bunker at max displacement = 33,713 tons

Complement:
 6,103 - 7,935

Cost:
 £111.332 million / $445.326 million

Distribution of weights at normal displacement:
 Armament: 8,639 tons, 3.1 %
 Armour: 89,799 tons, 31.9 %
    - Belts: 13,210 tons, 4.7 %
    - Torpedo bulkhead: 11,313 tons, 4.0 %
    - Armament: 17,708 tons, 6.3 %
    - Armour Deck: 45,720 tons, 16.3 %
    - Conning Tower: 1,849 tons, 0.7 %
 Machinery: 18,492 tons, 6.6 %
 Hull, fittings & equipment: 138,198 tons, 49.2 %
 Fuel, ammunition & stores: 28,011 tons, 10.0 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   920,311 lbs / 417,446 Kg = 172.9 x 22.0 " / 559 mm shells or 485.1 torpedoes
 Stability (Unstable if below 1.00): 1.63
 Metacentric height 46.1 ft / 14.1 m
 Roll period: 15.8 seconds
 Steadiness - As gun platform (Average = 50 %): 56 %
   - Recoil effect (Restricted arc if above 1.00): 0.09
 Seaboat quality  (Average = 1.00): 1.12

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and small transom stern
 Block coefficient (normal/deep): 0.657 / 0.663
 Length to Beam Ratio: 5.86 : 1
 'Natural speed' for length: 45.44 kts
 Power going to wave formation at top speed: 45 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 12.00 degrees
 Stern overhang: 5.00 ft / 1.52 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  45.00 ft / 13.72 m,  36.00 ft / 10.97 m
    - Forward deck: 30.00 %,  36.00 ft / 10.97 m,  34.00 ft / 10.36 m
    - Aft deck: 35.00 %,  34.00 ft / 10.36 m,  34.00 ft / 10.36 m
    - Quarter deck: 15.00 %,  34.00 ft / 10.36 m,  37.00 ft / 11.28 m
    - Average freeboard:  35.65 ft / 10.86 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 44.0 %
  - Above water (accommodation/working, high = better): 332.3 %
 Waterplane Area: 308,916 Square feet or 28,699 Square metres
 Displacement factor (Displacement / loading): 156 %
 Structure weight / hull surface area: 403 lbs/sq ft or 1,969 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 1.31
  - Longitudinal: 0.92
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is excellent
 Room for accommodation and workspaces is excellent