I have the start of a sketch design: Ger/DL/1916

I have this incomplete sketch design for a variant large destroyer leader, with a twin mount on the forecastle. The ship appears to have been intended to be about the same dimensions as the alternate Ger/DL/1915 design. Since the sketch is imcomplete, I chose to complete the design with 5-5in QF guns and 4-23.6in TT. I retained the twin mount on the forecastle, which actually makes the design work better than the superfiring arrangement on the Ger/DL/1915. This is the Springsharp report:

Ger/DL/1916 variant, Germany Destroyer Leader laid down 1916 (Engine 1950)

Displacement:
 1,901 t light; 1,979 t standard; 2,202 t normal; 2,380 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (394.12 ft / 390.00 ft) x 40.00 ft x (13.00 / 13.63 ft)
 (120.13 m / 118.87 m) x 12.19 m  x (3.96 / 4.16 m)

Armament:
      2 - 5.00" / 127 mm 50.0 cal guns - 65.00lbs / 29.48kg shells, 150 per gun
   Quick firing guns in deck and hoist mount, 1916 Model
   1 x Twin mount on centreline, forward deck forward
      3 - 5.00" / 127 mm 50.0 cal guns - 65.00lbs / 29.48kg shells, 150 per gun
   Quick firing guns in deck and hoist mounts, 1916 Model
   1 x Single mount on centreline, forward deck aft
  1 raised mount - superfiring
   2 x Single mounts on centreline, aft evenly spread
  1 raised mount
      Weight of broadside 325 lbs / 147 kg
      4 - 23.6" / 599 mm, 23.00 ft / 7.01 m torpedoes - 1.822 t each, 7.288 t total
 In 2 sets of deck mounted carriage/fixed tubes

Armour:
   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 3.00" / 76 mm 2.00" / 51 mm  3.00" / 76 mm
 2nd: 3.00" / 76 mm 2.00" / 51 mm  3.00" / 76 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 50,677 shp / 37,805 Kw = 36.00 kts
 Range 4,500nm at 15.00 kts
 Bunker at max displacement = 400 tons

Complement:
 159 - 208

Cost:
 £0.408 million / $1.632 million

Distribution of weights at normal displacement:
 Armament: 99 tons, 4.5 %
    - Guns: 91 tons, 4.1 %
    - Torpedoes: 7 tons, 0.3 %
 Armour: 61 tons, 2.8 %
    - Armament: 61 tons, 2.8 %
 Machinery: 1,056 tons, 47.9 %
 Hull, fittings & equipment: 686 tons, 31.1 %
 Fuel, ammunition & stores: 301 tons, 13.7 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   685 lbs / 311 Kg = 11.0 x 5.0 " / 127 mm shells or 0.4 torpedoes
 Stability (Unstable if below 1.00): 1.21
 Metacentric height 1.8 ft / 0.6 m
 Roll period: 12.5 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.41
 Seaboat quality  (Average = 1.00): 1.03

Hull form characteristics:
 Hull has rise forward of midbreak,
   a normal bow and large transom stern
 Block coefficient (normal/deep): 0.380 / 0.392
 Length to Beam Ratio: 9.75 : 1
 'Natural speed' for length: 22.97 kts
 Power going to wave formation at top speed: 67 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 9.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  26.00 ft / 7.92 m,  23.00 ft / 7.01 m
    - Forward deck: 19.00 %,  23.00 ft / 7.01 m,  22.00 ft / 6.71 m
    - Aft deck: 46.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
    - Quarter deck: 15.00 %,  14.00 ft / 4.27 m,  14.00 ft / 4.27 m
    - Average freeboard:  17.66 ft / 5.38 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 169.4 %
  - Above water (accommodation/working, high = better): 190.7 %
 Waterplane Area: 9,838 Square feet or 914 Square metres
 Displacement factor (Displacement / loading): 78 %
 Structure weight / hull surface area: 39 lbs/sq ft or 189 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.45
  - Longitudinal: 2.14
  - Overall: 0.52
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent