The Ger/CB/1935 design scales nicely for a 16.5in-gunned version

I found that the Ger/CB/1935 design scaled effortlessly to accomodate 16.5in guns. I only had to adjust the armoured length and the result already had adequate strength (at 1.0). The ship now has 9-16.5in guns and still has a 14in armour basis. This is really a fast battleship, but I have designated the family of ships as battlecruisers. Really, the American fast battleships were protected more on a battlecruiser scale, rather than on the scale of the American battleships from 1916 to 1923. The main difference was that the new ships had more deck armour. Anyway, this is the Springsharp report:

Ger/CB/1935  16.5in guns, Germany Battlecruiser laid down 1935

Displacement:
 46,861 t light; 49,855 t standard; 52,862 t normal; 55,268 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (863.41 ft / 854.00 ft) x 118.00 ft x (30.00 / 31.13 ft)
 (263.17 m / 260.30 m) x 35.97 m  x (9.14 / 9.49 m)

Armament:
      9 - 16.50" / 419 mm 50.0 cal guns - 2,380.00lbs / 1,079.55kg shells, 150 per gun
   Breech loading guns in turret on barbette mounts , 1935 Model
   3 x Triple mounts on centreline ends, majority forward
  1 raised mount - superfiring
      12 - 6.00" / 152 mm 55.0 cal guns - 115.00lbs / 52.16kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts , 1935 Model
   12 x Single mounts on sides, evenly spread
      12 - 4.00" / 102 mm 45.0 cal guns - 32.27lbs / 14.64kg shells, 150 per gun
   Anti-air guns in deck mount , 1935 Model
   1 x Single mount on sides amidships
      32 - 1.46" / 37.0 mm 60.0 cal guns - 1.69lbs / 0.77kg shells, 150 per gun
   Anti-air guns in deck mounts , 1935 Model
   8 x Single mounts on sides, evenly spread
  7 raised mounts
 Weight of broadside 23,241 lbs / 23,241 kg

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 14.0" / 356 mm 560.00 ft / 170.69 m 8.00 ft / 2.44 m
 Ends: Unarmoured
 Upper: 11.0" / 279 mm 560.00 ft / 170.69 m 8.00 ft / 2.44 m
   Main Belt covers 101 % of normal length

   - Torpedo Bulkhead:
  4.00" / 102 mm 560.00 ft / 170.69 m 30.00 ft / 9.14 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 14.0" / 356 mm 10.0" / 254 mm  14.0" / 356 mm
 2nd: 4.00" / 102 mm 1.00" / 25 mm  4.00" / 102 mm

   - Armour deck: 4.00" / 102 mm, Conning tower: 14.00" / 356 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 153,496 shp / 114,508 Kw = 29.00 kts
 Range 8,500nm at 15.00 kts
 Bunker at max displacement = 5,413 tons

Complement:
 1,743 - 2,266

Cost:
 £23.681 million / $94.724 million

Distribution of weights at normal displacement:
 Armament: 4,356 tons, 8.2 %
 Armour: 17,232 tons, 32.6 %
    - Belts: 4,830 tons, 9.1 %
    - Torpedo bulkhead: 2,486 tons, 4.7 %
    - Armament: 3,975 tons, 7.5 %
    - Armour Deck: 5,515 tons, 10.4 %
    - Conning Tower: 425 tons, 0.8 %
 Machinery: 4,361 tons, 8.2 %
 Hull, fittings & equipment: 22,410 tons, 42.4 %
 Fuel, ammunition & stores: 6,001 tons, 11.4 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   84,131 lbs / 38,161 Kg = 37.5 x 16.5 " / 419 mm shells or 14.8 torpedoes
 Stability (Unstable if below 1.00): 1.20
 Metacentric height 9.0 ft / 2.7 m
 Roll period: 16.5 seconds
 Steadiness - As gun platform (Average = 50 %): 63 %
   - Recoil effect (Restricted arc if above 1.00): 0.60
 Seaboat quality  (Average = 1.00): 1.27

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a cruiser stern
 Block coefficient (normal/deep): 0.612 / 0.617
 Length to Beam Ratio: 7.24 : 1
 'Natural speed' for length: 29.22 kts
 Power going to wave formation at top speed: 49 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 11.00 degrees
 Stern overhang: 3.00 ft / 0.91 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  33.00 ft / 10.06 m,  27.00 ft / 8.23 m
    - Forward deck: 30.00 %,  27.00 ft / 8.23 m,  24.00 ft / 7.32 m
    - Aft deck: 30.00 %,  24.00 ft / 7.32 m,  25.00 ft / 7.62 m
    - Quarter deck: 20.00 %,  25.00 ft / 7.62 m,  26.00 ft / 7.92 m
    - Average freeboard:  25.98 ft / 7.92 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 83.3 %
  - Above water (accommodation/working, high = better): 203.6 %
 Waterplane Area: 74,533 Square feet or 6,924 Square metres
 Displacement factor (Displacement / loading): 108 %
 Structure weight / hull surface area: 224 lbs/sq ft or 1,093 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.98
  - Longitudinal: 1.23
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is excellent
 Room for accommodation and workspaces is excellent
 Good seaboat, rides out heavy weather easily