Modernized Derfflinger

sharlin asked me to draw 3 alternative warships for him to use in an alternative universe board.
This is the 3rd and thus the last one: A modernized Derfflinger class Battlecruiser.
The 12 Casemated 15cm guns removed, and replaced with 10 single turrets of the same calibre but modern guns seen on the Deutchland class Big Gun Cruisers, 6 twin 105mm Flak cannons are added, reworked superstructure engine and funnels.

The Simulation:

KMS Derfflinger, German Battlecruiser laid down 1912 (Engine 1934)

Displacement:
27 694 t light; 28 900 t standard; 31 794 t normal; 34 109 t full load

Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(690,29 ft / 687,01 ft) x 98,43 ft x (31,17 / 32,92 ft)
(210,40 m / 209,40 m) x 30,00 m x (9,50 / 10,03 m)

Armament:
8 - 12,01" / 305 mm 50,0 cal guns - 914,92lbs / 415,00kg shells, 90 per gun
Breech loading guns in turret on barbette mounts, 1908 Model
4 x 2-gun mounts on centreline, evenly spread
2 raised mounts
10 - 5,91" / 150 mm 55,0 cal guns - 99,87lbs / 45,30kg shells, 150 per gun
Quick firing guns in deck and hoist mounts, 1928 Model
10 x Single mounts on side ends, majority forward
6 raised mounts - superfiring
12 - 4,13" / 105 mm 65,0 cal guns - 33,29lbs / 15,10kg shells, 400 per gun
Dual purpose guns in deck and hoist mounts, 1933 Model
6 x Twin mounts on sides, forward deck aft
6 double raised mounts
16 - 1,46" / 37,0 mm 83,0 cal guns - 1,59lbs / 0,72kg shells, 2 000 per gun
Anti-air guns in deck mounts, 1930 Model
8 x Twin mounts on sides, evenly spread
4 raised mounts
12 - 0,79" / 20,0 mm 65,0 cal guns - 0,29lbs / 0,13kg shells, 2 000 per gun
Machine guns in deck mounts, 1930 Model
12 x Single mounts on sides, evenly spread
6 raised mounts
Weight of broadside 8 746 lbs / 3 967 kg
Main Torpedoes
12 - 21,0" / 533 mm, 23,58 ft / 7,19 m torpedoes - 1,576 t each, 18,915 t total
In 4 sets of deck mounted centre rotating tubes

Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 11,8" / 300 mm 446,56 ft / 136,11 m 14,76 ft / 4,50 m
Ends: 4,72" / 120 mm 240,42 ft / 73,28 m 13,12 ft / 4,00 m
Upper: 3,15" / 80 mm 446,56 ft / 136,11 m 9,84 ft / 3,00 m
Main Belt covers 100 % of normal length

- Torpedo Bulkhead - Strengthened structural bulkheads:
1,77" / 45 mm 446,56 ft / 136,11 m 28,18 ft / 8,59 m
Beam between torpedo bulkheads 88,58 ft / 27,00 m

- Hull void:
7,87" / 200 mm 426,51 ft / 130,00 m 19,69 ft / 6,00 m

- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 10,6" / 270 mm 5,91" / 150 mm 8,66" / 220 mm
2nd: 0,39" / 10 mm 0,39" / 10 mm 0,39" / 10 mm
3rd: 0,39" / 10 mm 0,39" / 10 mm 0,39" / 10 mm

- Armoured deck - single deck:
For and Aft decks: 3,15" / 80 mm
Forecastle: 1,18" / 30 mm Quarter deck: 1,18" / 30 mm

- Conning towers: Forward 11,81" / 300 mm, Aft 5,91" / 150 mm

Machinery:
Oil fired boilers, steam turbines,
Geared drive, 4 shafts, 138 001 shp / 102 948 Kw = 30,27 kts
Range 6 673nm at 19,00 kts
Bunker at max displacement = 5 208 tons

Complement:
1 189 - 1 547

Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
47 496 lbs / 21 544 Kg = 54,9 x 12,0 " / 305 mm shells or 6,2 torpedoes
Metacentric height 7,2 ft / 2,2 m
Roll period: 15,4 seconds

Hull form characteristics:
Hull has a flush deck,
a normal bow and a cruiser stern
Length to Beam Ratio: 6,98 : 1
'Natural speed' for length: 26,21 kts
Power going to wave formation at top speed: 56 %
Ship tends to be wet forward

Ship space, strength and comments:
Waterplane Area: 46 230 Square feet or 4 295 Square metres
Structure weight / hull surface area: 168 lbs/sq ft or 822 Kg/sq metre