My odd Northampton armoured cruiser

On the same page as the small drawing of the Shannon, I have a drawing of my Northampton armoured cruiser that I have dated as having been rebuilt or built anachronistically in 1896. I have used the original dimensions and displacement for this version, which has twqo funnels and the heavy pole masts. The armament is 4-8in and 10-6in QF guns. I increased the armour basis to 9in. The speed and range are also greater than the Shannon. This is the Springsharp report:

HMS Northampton, Great Britain Armoured Cruiser laid down 1896

Displacement:
 6,671 t light; 6,950 t standard; 7,630 t normal; 8,174 t full load

Dimensions: Length overall / water x beam x draught
 280.00 ft / 280.00 ft x 60.00 ft x 23.90 ft (normal load)
 85.34 m / 85.34 m x 18.29 m  x 7.28 m

Armament:
      4 - 8.00" / 203 mm guns (2x2 guns), 256.00lbs / 116.12kg shells, 1896 Model
   Breech loading guns in turrets (on barbettes)
   on centreline ends, evenly spread
      10 - 6.00" / 152 mm guns in single mounts, 108.00lbs / 48.99kg shells, 1896 Model
   Quick firing guns in casemate mounts 
   on side, all amidships
   6 guns in hull casemates - Limited use in heavy seas
 Weight of broadside 2,104 lbs / 954 kg
 Shells per gun, main battery: 100

Armour:
   - Belts:  Width (max) Length (avg)  Height (avg)
 Main: 9.00" / 229 mm 180.00 ft / 54.86 m 9.00 ft / 2.74 m
 Ends: 5.00" / 127 mm 100.00 ft / 30.48 m 16.00 ft / 4.88 m
 Upper: 6.00" / 152 mm 180.00 ft / 54.86 m 8.00 ft / 2.44 m
   Main Belt covers 99 % of normal length
   Main belt does not fully cover magazines and engineering spaces

   - Torpedo Bulkhead:
  1.00" / 25 mm 180.00 ft / 54.86 m 20.00 ft / 6.10 m

   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 9.00" / 229 mm 6.00" / 152 mm  9.00" / 229 mm
 2nd: 6.00" / 152 mm 6.00" / 152 mm  6.00" / 152 mm

   - Armour deck: 3.00" / 76 mm, Conning tower: 9.00" / 229 mm

Machinery:
 Coal fired boilers, complex reciprocating steam engines, 
 Direct drive, 2 shafts, 8,966 ihp / 6,688 Kw = 17.00 kts
 Range 5,400nm at 10.00 kts
 Bunker at max displacement = 1,223 tons (100% coal)

Complement:
 407 - 530

Cost:
 £0.664 million / $2.654 million

Distribution of weights at normal displacement:
 Armament: 263 tons, 3.4 %
 Armour: 2,913 tons, 38.2 %
    - Belts: 1,361 tons, 17.8 %
    - Torpedo bulkhead: 133 tons, 1.7 %
    - Armament: 620 tons, 8.1 %
    - Armour Deck: 724 tons, 9.5 %
    - Conning Tower: 75 tons, 1.0 %
 Machinery: 1,494 tons, 19.6 %
 Hull, fittings & equipment: 2,000 tons, 26.2 %
 Fuel, ammunition & stores: 959 tons, 12.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   8,429 lbs / 3,823 Kg = 32.9 x 8.0 " / 203 mm shells or 1.6 torpedoes
 Stability (Unstable if below 1.00): 1.18
 Metacentric height 3.2 ft / 1.0 m
 Roll period: 14.2 seconds
 Steadiness - As gun platform (Average = 50 %): 68 %
   - Recoil effect (Restricted arc if above 1.00): 0.39
 Seaboat quality  (Average = 1.00): 1.36

Hull form characteristics:
 Hull has a flush deck
 Block coefficient: 0.665
 Length to Beam Ratio: 4.67 : 1
 'Natural speed' for length: 16.73 kts
 Power going to wave formation at top speed: 59 %
 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:  20.00 ft / 6.10 m
    - Forecastle (20 %): 17.00 ft / 5.18 m
    - Mid (50 %):  17.00 ft / 5.18 m
    - Quarterdeck (15 %): 17.00 ft / 5.18 m
    - Stern:  17.00 ft / 5.18 m
    - Average freeboard: 17.24 ft / 5.25 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 134.8 %
  - Above water (accommodation/working, high = better): 103.8 %
 Waterplane Area: 13,049 Square feet or 1,212 Square metres
 Displacement factor (Displacement / loading): 95 %
 Structure weight / hull surface area: 99 lbs/sq ft or 483 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.87
  - Longitudinal: 3.61
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is adequate
 Good seaboat, rides out heavy weather easily