A generic 1905 Tribal class destroyer

I am shocked. I was able to make a generic 1905 British Tribal class destroyer work in Springsharp 3.0b2 Beta. This is a class of ship that eventually carried 2-4in QF guns and 2-18in TT. They were originally intended to have a speed of 33 knots and carry 90 tons of oil fuel. I have done pretty well, I think, except that my ship is very light, and depends on the lightest weight machinery:

GB/DD/1905 generic Tribal class, Great Britain Destroyer laid down 1905 (Engine 1950)

Displacement:
 633 t light; 655 t standard; 723 t normal; 777 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (276.84 ft / 275.00 ft) x 28.00 ft x (9.00 / 9.41 ft)
 (84.38 m / 83.82 m) x 8.53 m  x (2.74 / 2.87 m)

Armament:
      2 - 4.00" / 102 mm 45.0 cal guns - 32.27lbs / 14.64kg shells, 150 per gun
   Quick firing guns in deck mounts, 1905 Model
   2 x Single mounts on centreline ends, evenly spread
      Weight of broadside 65 lbs / 29 kg
      2 - 18.0" / 457 mm, 20.00 ft / 6.10 m torpedoes - 0.865 t each, 1.729 t total
 In 2 sets of deck mounted centre rotating tubes

Machinery:
 Oil fired boilers, steam turbines, 
 Direct drive, 2 shafts, 25,253 shp / 18,839 Kw = 33.00 kts
 Range 3,500nm at 14.00 kts
 Bunker at max displacement = 123 tons

Complement:
 69 - 90

Cost:
 £0.079 million / $0.315 million

Distribution of weights at normal displacement:
 Armament: 13 tons, 1.8 %
    - Guns: 12 tons, 1.6 %
    - Torpedoes: 2 tons, 0.2 %
 Machinery: 381 tons, 52.7 %
 Hull, fittings & equipment: 239 tons, 33.0 %
 Fuel, ammunition & stores: 90 tons, 12.4 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   242 lbs / 110 Kg = 7.6 x 4.0 " / 102 mm shells or 0.2 torpedoes
 Stability (Unstable if below 1.00): 1.37
 Metacentric height 1.3 ft / 0.4 m
 Roll period: 10.4 seconds
 Steadiness - As gun platform (Average = 50 %): 52 %
   - Recoil effect (Restricted arc if above 1.00): 0.10
 Seaboat quality  (Average = 1.00): 1.04

Hull form characteristics:
 Hull has rise forward of midbreak,
   a normal bow and a round stern
 Block coefficient (normal/deep): 0.365 / 0.375
 Length to Beam Ratio: 9.82 : 1
 'Natural speed' for length: 16.58 kts
 Power going to wave formation at top speed: 70 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 5.00 degrees
 Stern overhang: 0.00 ft / 0.00 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 14.00 %,  21.00 ft / 6.40 m,  19.00 ft / 5.79 m
    - Forward deck: 15.00 %,  19.00 ft / 5.79 m,  19.00 ft / 5.79 m
    - Aft deck: 56.00 %,  11.00 ft / 3.35 m,  11.00 ft / 3.35 m
    - Quarter deck: 15.00 %,  11.00 ft / 3.35 m,  11.00 ft / 3.35 m
    - Average freeboard:  13.43 ft / 4.09 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 174.8 %
  - Above water (accommodation/working, high = better): 123.0 %
 Waterplane Area: 4,635 Square feet or 431 Square metres
 Displacement factor (Displacement / loading): 58 %
 Structure weight / hull surface area: 25 lbs/sq ft or 121 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.43
  - Longitudinal: 3.07
  - Overall: 0.53
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent