I recalculated my little supership, the Ger/BB/1915 750ft

I am working my way, methodically, through the Red Book, and the current page is has one variation of the specifications for a short (750ft) 72,000 ton battleship with 9-18in BLR and 24-5in QF guns. The original concept was for just 20 knots, but with 120,000 SHP and 40SHP/ton of machinery weight. The appearance is like a WWII battleship with a tower mast and two funnels, with the forefunnel being taller. There may well be some issue with what I have done, and I would be interested to know, if there is. This is the Springsharp report:

Ger/BB/1915, Germany Battleship laid down 1915 (Engine 1927)

Displacement:
 64,050 t light; 66,850 t standard; 72,000 t normal; 76,120 t full load

Dimensions: Length overall / water x beam x draught
 751.78 ft / 750.00 ft x 130.00 ft x 40.00 ft (normal load)
 229.14 m / 228.60 m x 39.62 m  x 12.19 m

Armament:
      9 - 18.00" / 457 mm guns (3x3 guns), 3,200.00lbs / 1,451.50kg shells, 1915 Model
   Breech loading guns in turrets (on barbettes)
   on centreline, all forward, 1 raised mount - superfiring
      24 - 5.00" / 127 mm guns (12x2 guns), 62.50lbs / 28.35kg shells, 1915 Model
   Quick firing guns in turrets (on barbettes)
   on side, all forward, 4 raised mounts - superfiring
 Weight of broadside 30,300 lbs / 13,744 kg
 Shells per gun, main battery: 80

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 18.0" / 457 mm 560.00 ft / 170.69 m 18.00 ft / 5.49 m
 Ends: Unarmoured
   Main Belt covers 115 % of normal length

   - Torpedo Bulkhead:
  4.00" / 102 mm 560.00 ft / 170.69 m 37.00 ft / 11.28 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 20.0" / 508 mm 14.0" / 356 mm  18.0" / 457 mm
 2nd: 6.00" / 152 mm 6.00" / 152 mm  6.00" / 152 mm

   - Armour deck: 8.00" / 203 mm, Conning tower: 18.00" / 457 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 150,797 shp / 112,494 Kw = 27.00 kts
 Range 7,500nm at 18.00 kts
 Bunker at max displacement = 9,269 tons

Complement:
 2,197 - 2,857

Cost:
 £8.467 million / $33.869 million

Distribution of weights at normal displacement:
 Armament: 3,468 tons, 4.8 %
 Armour: 30,251 tons, 42.0 %
    - Belts: 7,792 tons, 10.8 %
    - Torpedo bulkhead: 3,067 tons, 4.3 %
    - Armament: 7,706 tons, 10.7 %
    - Armour Deck: 11,015 tons, 15.3 %
    - Conning Tower: 671 tons, 0.9 %
 Machinery: 4,760 tons, 6.6 %
 Hull, fittings & equipment: 25,571 tons, 35.5 %
 Fuel, ammunition & stores: 7,950 tons, 11.0 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   118,530 lbs / 53,764 Kg = 40.6 x 18.0 " / 457 mm shells or 24.4 torpedoes
 Stability (Unstable if below 1.00): 1.06
 Metacentric height 8.3 ft / 2.5 m
 Roll period: 18.9 seconds
 Steadiness - As gun platform (Average = 50 %): 70 %
   - Recoil effect (Restricted arc if above 1.00): 0.72
 Seaboat quality  (Average = 1.00): 1.40

Hull form characteristics:
 Hull has a flush deck
 Block coefficient: 0.646
 Length to Beam Ratio: 5.77 : 1
 'Natural speed' for length: 27.39 kts
 Power going to wave formation at top speed: 54 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 3.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  34.00 ft / 10.36 m
    - Forecastle (20 %): 29.00 ft / 8.84 m
    - Mid (50 %):  29.00 ft / 8.84 m
    - Quarterdeck (15 %): 29.00 ft / 8.84 m
    - Stern:  29.00 ft / 8.84 m
    - Average freeboard: 29.40 ft / 8.96 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 68.6 %
  - Above water (accommodation/working, high = better): 187.1 %
 Waterplane Area: 74,428 Square feet or 6,915 Square metres
 Displacement factor (Displacement / loading): 107 %
 Structure weight / hull surface area: 246 lbs/sq ft or 1,203 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.92
  - Longitudinal: 2.18
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is excellent
 Room for accommodation and workspaces is excellent
 Ship has slow, easy roll, a good, steady gun platform
 Good seaboat, rides out heavy weather easily