The Ger/BB/1916 design

I have this nice pencil drawing of the inboard profile of what is labelled as the Ger/BB/1916. I have attributed 20in guns to this ship in the past, and did so again. That gives the ship 9-20in/45 and 24-5in QF guns (in twin mounts). The length is rather short, being 760ft. The ship is flush-decked with two funnels. I did a Springsharp report based on what I believe to be the sort of specifications that I had intended:

Ger/BB/1916, Germany Battleship laid down 1916 (Engine 1927)

Displacement:
 63,597 t light; 66,677 t standard; 70,000 t normal; 72,659 t full load

Dimensions: Length overall / water x beam x draught
 761.68 ft / 760.00 ft x 130.00 ft x 35.00 ft (normal load)
 232.16 m / 231.65 m x 39.62 m  x 10.67 m

Armament:
      9 - 20.00" / 508 mm guns (3x3 guns), 4,000.00lbs / 1,814.37kg shells, 1916 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, majority forward, 1 raised mount - superfiring
      24 - 5.00" / 127 mm guns (12x2 guns), 62.50lbs / 28.35kg shells, 1916 Model
   Quick firing guns in turrets (on barbettes)
   on side, all amidships, 4 raised mounts - superfiring
 Weight of broadside 37,500 lbs / 17,010 kg
 Shells per gun, main battery: 80

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 18.0" / 457 mm 410.00 ft / 124.97 m 16.00 ft / 4.88 m
 Ends: Unarmoured
   Main Belt covers 83 % of normal length

   - Torpedo Bulkhead:
  4.00" / 102 mm 410.00 ft / 124.97 m 34.00 ft / 10.36 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 18.0" / 457 mm 11.0" / 279 mm  18.0" / 457 mm
 2nd: 5.00" / 127 mm 5.00" / 127 mm  5.00" / 127 mm

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

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 4 shafts, 131,101 shp / 97,801 Kw = 26.00 kts
 Range 7,200nm at 15.00 kts
 Bunker at max displacement = 5,982 tons

Complement:
 2,151 - 2,797

Cost:
 £11.034 million / $44.134 million

Distribution of weights at normal displacement:
 Armament: 4,688 tons, 6.7 %
 Armour: 27,384 tons, 39.1 %
    - Belts: 5,518 tons, 7.9 %
    - Torpedo bulkhead: 2,063 tons, 2.9 %
    - Armament: 7,336 tons, 10.5 %
    - Armour Deck: 11,809 tons, 16.9 %
    - Conning Tower: 659 tons, 0.9 %
 Machinery: 4,138 tons, 5.9 %
 Hull, fittings & equipment: 27,387 tons, 39.1 %
 Fuel, ammunition & stores: 6,403 tons, 9.1 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   97,531 lbs / 44,239 Kg = 24.4 x 20.0 " / 508 mm shells or 16.8 torpedoes
 Stability (Unstable if below 1.00): 1.09
 Metacentric height 8.7 ft / 2.7 m
 Roll period: 18.5 seconds
 Steadiness - As gun platform (Average = 50 %): 61 %
   - Recoil effect (Restricted arc if above 1.00): 0.74
 Seaboat quality  (Average = 1.00): 1.21

Hull form characteristics:
 Hull has a flush deck
 Block coefficient: 0.709
 Length to Beam Ratio: 5.85 : 1
 'Natural speed' for length: 27.57 kts
 Power going to wave formation at top speed: 52 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 3.00 degrees
 Stern overhang: -1.00 ft / -0.30 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  32.00 ft / 9.75 m
    - Forecastle (20 %): 26.00 ft / 7.92 m
    - Mid (50 %):  26.00 ft / 7.92 m
    - Quarterdeck (15 %): 26.00 ft / 7.92 m
    - Stern:  26.00 ft / 7.92 m
    - Average freeboard: 26.48 ft / 8.07 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 81.7 %
  - Above water (accommodation/working, high = better): 183.7 %
 Waterplane Area: 79,792 Square feet or 7,413 Square metres
 Displacement factor (Displacement / loading): 96 %
 Structure weight / hull surface area: 261 lbs/sq ft or 1,273 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.95
  - Longitudinal: 1.63
  - 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