I was curious to see if I could make the Ger/CB/1907 smaller

I wanted to see if I reduced the armour basis to 10.5in and the deck to 2.5in, if I could reduce the displacement. I was able to reduce the draft to 28ft, instead of 29ft and the standard displacement to 23,291 tons (25,700 tons normal). Survivability still seems to be pretty good. This is the revised Springsharp report:

Ger/CB/1907, Germany Battlecruiser laid down 1907

Displacement:
 22,356 t light; 23,291 t standard; 25,700 t normal; 27,627 t full load

Dimensions: Length overall / water x beam x draught
 600.00 ft / 600.00 ft x 88.00 ft x 28.00 ft (normal load)
 182.88 m / 182.88 m x 26.82 m  x 8.53 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, 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: 90

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 10.5" / 267 mm 360.00 ft / 109.73 m 9.00 ft / 2.74 m
 Ends: 5.00" / 127 mm 240.00 ft / 73.15 m 12.00 ft / 3.66 m
 Upper: 7.00" / 178 mm 360.00 ft / 109.73 m 8.00 ft / 2.44 m
   Main Belt covers 92 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  2.00" / 51 mm 360.00 ft / 109.73 m 28.00 ft / 8.53 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 10.5" / 267 mm 8.00" / 203 mm  10.5" / 267 mm
 2nd: 6.00" / 152 mm 6.00" / 152 mm  6.00" / 152 mm

   - Armour deck: 2.50" / 64 mm, Conning tower: 10.50" / 267 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 4 shafts, 83,925 shp / 62,608 Kw = 27.00 kts
 Range 5,400nm at 15.00 kts
 Bunker at max displacement = 4,337 tons

Complement:
 1,014 - 1,319

Cost:
 £2.312 million / $9.247 million

Distribution of weights at normal displacement:
 Armament: 1,026 tons, 4.0 %
 Armour: 7,799 tons, 30.3 %
    - Belts: 2,930 tons, 11.4 %
    - Torpedo bulkhead: 746 tons, 2.9 %
    - Armament: 2,126 tons, 8.3 %
    - Armour Deck: 1,800 tons, 7.0 %
    - Conning Tower: 197 tons, 0.8 %
 Machinery: 4,768 tons, 18.6 %
 Hull, fittings & equipment: 8,762 tons, 34.1 %
 Fuel, ammunition & stores: 3,344 tons, 13.0 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   30,556 lbs / 13,860 Kg = 35.4 x 12.0 " / 305 mm shells or 4.2 torpedoes
 Stability (Unstable if below 1.00): 1.18
 Metacentric height 5.6 ft / 1.7 m
 Roll period: 15.6 seconds
 Steadiness - As gun platform (Average = 50 %): 55 %
   - Recoil effect (Restricted arc if above 1.00): 0.50
 Seaboat quality  (Average = 1.00): 1.11

Hull form characteristics:
 Hull has rise forward of midbreak
 Block coefficient: 0.608
 Length to Beam Ratio: 6.82 : 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): -2.00 degrees
 Stern overhang: -2.00 ft / -0.61 m
 Freeboard (% = measuring location as a percentage of overall length):
    - Stem:  27.00 ft / 8.23 m
    - Forecastle (20 %): 25.00 ft / 7.62 m
    - Mid (67 %):  25.00 ft / 7.62 m (17.00 ft / 5.18 m aft of break)
    - Quarterdeck (15 %): 17.00 ft / 5.18 m
    - Stern:  17.00 ft / 5.18 m
    - Average freeboard: 22.52 ft / 6.86 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 116.8 %
  - Above water (accommodation/working, high = better): 166.6 %
 Waterplane Area: 38,922 Square feet or 3,616 Square metres
 Displacement factor (Displacement / loading): 101 %
 Structure weight / hull surface area: 155 lbs/sq ft or 757 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.95
  - Longitudinal: 1.54
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent