I have a German battlecruiser design, circa 1907 or so (Updated)

I have a pencil sketch for a German battlecruiser design from about 1907 or slightly later. The design ws to be 21.500 tons, 600ft x 95ft x 24ft, with 8-12in/45 and 12-6in/45 guns. The maximum speed was hoped to be 30 knots, but in another note, the speed is 28.6 knots. The prismatic coefficient was to be 0.57 and the midship coefficient was 0.97. The weights were:

• Hull: 6,950 tons
• Aux. Machinery: 762 tons
• Machinery: 2,690 tons
• Armament: 1,320 tons
• Protection: 6,678 tons
• Miscellaneous: 1,600 tons

The standard displacement was apparently to be 20,000 tons. In one place, I had written that the normal SHP would be 80,600. The machinery was apparently to be very light.

This is the corresponding Springsharp report:

Ger/CB/1907 design study, Germany Battlecruiser laid down 1907 (Engine 1933)

Displacement:
 19,623 t light; 20,427 t standard; 21,500 t normal; 22,358 t full load

Dimensions: Length overall / water x beam x draught
 600.00 ft / 600.00 ft x 95.00 ft x 27.00 ft (normal load)
 182.88 m / 182.88 m x 28.96 m  x 8.23 m

Armament:
      8 - 12.00" / 305 mm guns (4x2 guns), 864.00lbs / 391.90kg shells, 1907 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread, 1 raised mount aft - superfiring
      12 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1907 Model
   Quick firing guns in casemate mounts 
   on side ends, evenly spread
   12 guns in hull casemates - Limited use in heavy seas
 Weight of broadside 8,208 lbs / 3,723 kg
 Shells per gun, main battery: 80

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 10.0" / 254 mm 390.00 ft / 118.87 m 9.00 ft / 2.74 m
 Ends: Unarmoured
 Upper: 8.00" / 203 mm 230.00 ft / 70.10 m 8.00 ft / 2.44 m
   Main Belt covers 100 % of normal length

   - Torpedo Bulkhead:
  1.50" / 38 mm 390.00 ft / 118.87 m 26.00 ft / 7.92 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 10.0" / 254 mm 6.00" / 152 mm  10.0" / 254 mm
 2nd: 5.00" / 127 mm 5.00" / 127 mm  5.00" / 127 mm

   - Armour deck: 2.50" / 64 mm, Conning tower: 10.00" / 254 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 90,855 shp / 67,778 Kw = 28.60 kts
 Range 5,200nm at 15.00 kts
 Bunker at max displacement = 1,931 tons

Complement:
 887 - 1,154

Cost:
 £1.919 million / $7.677 million

Distribution of weights at normal displacement:
 Armament: 1,026 tons, 4.8 %
 Armour: 6,742 tons, 31.4 %
    - Belts: 2,264 tons, 10.5 %
    - Torpedo bulkhead: 563 tons, 2.6 %
    - Armament: 2,010 tons, 9.3 %
    - Armour Deck: 1,739 tons, 8.1 %
    - Conning Tower: 167 tons, 0.8 %
 Machinery: 2,647 tons, 12.3 %
 Hull, fittings & equipment: 9,207 tons, 42.8 %
 Fuel, ammunition & stores: 1,877 tons, 8.7 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   33,938 lbs / 15,394 Kg = 39.3 x 12.0 " / 305 mm shells or 5.4 torpedoes
 Stability (Unstable if below 1.00): 1.12
 Metacentric height 5.8 ft / 1.8 m
 Roll period: 16.6 seconds
 Steadiness - As gun platform (Average = 50 %): 62 %
   - Recoil effect (Restricted arc if above 1.00): 0.52
 Seaboat quality  (Average = 1.00): 1.23

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.489
 Length to Beam Ratio: 6.32 : 1
 'Natural speed' for length: 24.49 kts
 Power going to wave formation at top speed: 56 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): -1.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  29.00 ft / 8.84 m
    - Forecastle (20 %): 27.00 ft / 8.23 m
    - Mid (70 %):  27.00 ft / 8.23 m (19.00 ft / 5.79 m aft of break)
    - Quarterdeck (15 %): 19.00 ft / 5.79 m
    - Stern:  19.00 ft / 5.79 m
    - Average freeboard: 24.76 ft / 7.55 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 96.0 %
  - Above water (accommodation/working, high = better): 203.1 %
 Waterplane Area: 37,600 Square feet or 3,493 Square metres
 Displacement factor (Displacement / loading): 106 %
 Structure weight / hull surface area: 168 lbs/sq ft or 820 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.92
  - Longitudinal: 2.15
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is adequate
 Room for accommodation and workspaces is excellent
 Good seaboat, rides out heavy weather easily