I can't make the Capitani Romani class work in Springsharp 3.0b1 Beta

I apparently cannot make the machinery sufficiently light enough to make the Italian Capitani Romani class ships work in Springsharp 3.0b1 Beta (the Attilio Regolo, in particular). I was able to reduce the performance sufficiently, that I could make a workable Springsharp design, but the result is a hollow victory:

Capitani Romani class, Italy Light Cruiser laid down 1940 (Engine 1950)

Displacement:
 4,045 t light; 4,187 t standard; 4,526 t normal; 4,797 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
 (465.72 ft / 459.32 ft) x 47.24 ft x (16.40 / 17.09 ft)
 (141.95 m / 140.00 m) x 14.40 m  x (5.00 / 5.21 m)

Armament:
      8 - 5.31" / 135 mm 45.0 cal guns - 75.71lbs / 34.34kg shells, 150 per gun
   Quick firing guns in turret on barbette mounts , 1940 Model
   4 x Twin mounts on centreline ends, evenly spread
  2 raised mounts - superfiring
      8 - 1.46" / 37.0 mm 60.0 cal guns - 1.69lbs / 0.77kg shells, 150 per gun
   Anti-air guns in deck mounts , 1940 Model
   8 x Single mounts on sides, evenly spread
  8 raised mounts
 Weight of broadside 619 lbs / 619 kg
 8 - 21.0" / 533 mm above water torpedoes

Armour:
   - Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
 Main: 0.47" / 12 mm 0.39" / 10 mm  0.47" / 12 mm

   - Armour deck: 0.39" / 10 mm, Conning tower: 0.59" / 15 mm

Machinery:
 Oil fired boilers, steam turbines, 
 Geared drive, 2 shafts, 72,626 shp / 54,179 Kw = 34.00 kts
 Range 3,200nm at 18.00 kts
 Bunker at max displacement = 610 tons

Complement:
 275 - 358

Cost:
 £2.661 million / $10.644 million

Distribution of weights at normal displacement:
 Armament: 144 tons, 3.2 %
 Armour: 137 tons, 3.0 %
    - Belts: 0 tons, 0.0 %
    - Torpedo bulkhead: 0 tons, 0.0 %
    - Armament: 33 tons, 0.7 %
    - Armour Deck: 100 tons, 2.2 %
    - Conning Tower: 3 tons, 0.1 %
 Machinery: 1,737 tons, 38.4 %
 Hull, fittings & equipment: 2,101 tons, 46.4 %
 Fuel, ammunition & stores: 481 tons, 10.6 %
 Miscellaneous weights: 0 tons, 0.0 %

Overall survivability and seakeeping ability:
 Survivability (Non-critical penetrating hits needed to sink ship):
   3,421 lbs / 1,552 Kg = 45.6 x 5.3 " / 135 mm shells or 0.7 torpedoes
 Stability (Unstable if below 1.00): 1.17
 Metacentric height 2.2 ft / 0.7 m
 Roll period: 13.4 seconds
 Steadiness - As gun platform (Average = 50 %): 54 %
   - Recoil effect (Restricted arc if above 1.00): 0.43
 Seaboat quality  (Average = 1.00): 1.08

Hull form characteristics:
 Hull has a flush deck,
   a normal bow and a round stern
 Block coefficient (normal/deep): 0.445 / 0.453
 Length to Beam Ratio: 9.72 : 1
 'Natural speed' for length: 21.43 kts
 Power going to wave formation at top speed: 64 %
 Trim (Max stability = 0, Max steadiness = 100): 50
 Bow angle (Positive = bow angles forward): 11.00 degrees
 Stern overhang: 0.98 ft / 0.30 m
 Freeboard (% = length of deck as a percentage of waterline length):
    Fore end,  Aft end
    - Forecastle: 20.00 %,  27.89 ft / 8.50 m,  21.33 ft / 6.50 m
    - Forward deck: 30.00 %,  21.33 ft / 6.50 m,  18.04 ft / 5.50 m
    - Aft deck: 35.00 %,  18.04 ft / 5.50 m,  16.40 ft / 5.00 m
    - Quarter deck: 15.00 %,  16.40 ft / 5.00 m,  16.40 ft / 5.00 m
    - Average freeboard:  19.18 ft / 5.85 m

Ship space, strength and comments:
 Space - Hull below water (magazines/engines, low = better): 136.4 %
  - Above water (accommodation/working, high = better): 130.8 %
 Waterplane Area: 13,786 Square feet or 1,281 Square metres
 Displacement factor (Displacement / loading): 109 %
 Structure weight / hull surface area: 82 lbs/sq ft or 398 Kg/sq metre
 Hull strength (Relative):
  - Cross-sectional: 0.89
  - Longitudinal: 2.73
  - Overall: 1.00
 Hull space for machinery, storage, compartmentation is cramped
 Room for accommodation and workspaces is excellent