The GB/CB/1914 Fast design works

I was pleasantly surprised that with lightweight machinery, the GB/CB/1914 Fast design works, as specified. The only exception is that to reach 38 knots, much greater power is required. That means that the machinery must be compact and light, necessitating using 1927 machinery (the only way to get lighter machinery in Springsharp). The ship has 4-13.5in/45 BLR and 16-4in QF guns. The armour basis is 6in with a 2in deck. This is the Springsharp report:

GB/CB/1914 Fast, Great Britain Battlecruiser laid down 1914 (Engine 1927)

Displacement:
 28,679 t light; 29,643 t standard; 31,977 t normal; 33,844 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (854.64 ft / 850.00 ft) x 95.00 ft x (30.00 / 31.26 ft)
 (260.49 m / 259.08 m) x 28.96 m  x (9.14 / 9.53 m)

Armament:
      4 - 13.50" / 343 mm 45.0 cal guns - 1,400.00lbs / 635.03kg shells, 90 per gun
   Breech loading guns in turret on barbette mounts , 1914 Model
   2 x Single mounts on centreline ends, evenly spread
      16 - 4.00" / 102 mm 50.0 cal guns - 33.88lbs / 15.37kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts , 1914 Model
   8 x Twin mounts on sides, evenly spread
 Weight of broadside 6,142 lbs / 6,142 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 6.00" / 152 mm 475.00 ft / 144.78 m 16.00 ft / 4.88 m
 Ends: Unarmoured
   Main Belt covers 86 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.50" / 38 mm 475.00 ft / 144.78 m 30.00 ft / 9.14 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 7.00" / 178 mm 5.00" / 127 mm  7.00" / 178 mm
 2nd: 2.00" / 51 mm 1.00" / 25 mm  2.00" / 51 mm

   - Armour deck: 2.00" / 51 mm, Conning tower: 7.00" / 178 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 297,769 shp / 222,135 Kw = 38.00 kts
 Range 8,500nm at 15.00 kts
 Bunker at max displacement = 4,201 tons

Complement:
 1,195 - 1,554

Cost:
 £3.616 million / $14.462 million

Distribution of weights at normal displacement:
 Armament: 1,178 tons, 3.7 %
 Armour: 5,714 tons, 17.9 %
    - Belts: 1,964 tons, 6.1 %
    - Torpedo bulkhead: 791 tons, 2.5 %
    - Armament: 882 tons, 2.8 %
    - Armour Deck: 1,925 tons, 6.0 %
    - Conning Tower: 152 tons, 0.5 %
 Machinery: 9,399 tons, 29.4 %
 Hull, fittings & equipment: 12,945 tons, 40.5 %
 Fuel, ammunition & stores: 3,298 tons, 10.3 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   34,614 lbs / 15,701 Kg = 28.1 x 13.5 " / 343 mm shells or 3.9 torpedoes
 Stability (Unstable if below 1.00): 1.34
 Metacentric height 7.8 ft / 2.4 m
 Roll period: 14.3 seconds
 Steadiness - As gun platform (Average = 50 %): 53 %
   - Recoil effect (Restricted arc if above 1.00): 0.29
 Seaboat quality  (Average = 1.00): 1.06

Hull form characteristics:
 Hull has low quarterdeck ,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.462 / 0.469
 Length to Beam Ratio: 8.95 : 1
 'Natural speed' for length: 29.15 kts
 Power going to wave formation at top speed: 57 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 8.00 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 %,  33.00 ft / 10.06 m,  28.00 ft / 8.53 m
    - Forward deck: 30.00 %,  28.00 ft / 8.53 m,  27.00 ft / 8.23 m
    - Aft deck: 18.00 %,  27.00 ft / 8.23 m,  27.00 ft / 8.23 m
    - Quarter deck: 32.00 %,  19.00 ft / 5.79 m,  20.00 ft / 6.10 m
    - Average freeboard:  25.35 ft / 7.73 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 139.6 %
  - Above water (accommodation/working, high = better): 226.5 %
 Waterplane Area: 52,026 Square feet or 4,833 Square metres
 Displacement factor (Displacement / loading): 108 %
 Structure weight / hull surface area: 165 lbs/sq ft or 805 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.98
  - Longitudinal: 1.29
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent