We've been discussing the strategy and tactics for surface raiders and designs. I have always thought that the Admiral Graf Von Spee was overgunned and the conning tower was too massive. In reports from the British Force K they have indicated that when they saw her, she never resembled a British warship. We know that stealth is important. Stealth in this sense is radio silence and visual. Graf Von Spee did repaint herself and had changed her name to Admiral Sheer, but she still, even with a second funnel added, looked the same. This is a mistake.
A 2x3x210mm/45 with the turrets at either end of the ship isn't likely to resemble any historical Allied or neutral cruiser significantly more than the Deutschland class did, especially if there isn't space to put a fake turret behind at least the forward triple. There just aren't that many historical ships that look like a 2x3 whether from above or in profile, and as long as the forward part of the superstructure is right behind the forward turret there's not a whole lot that can be done to disguise that. With three turrets the ship can at least have a similar profile to a number of other ships with three turrets, and as such if you want the ship to resemble historical Allied cruisers while retaining the six-gun main battery, it might be better to put them into three twin turrets (forward superfiring pair and an after turret) so that it can have some natural resemblance to the 3x2x8" York, Aoba, and refitted Furutaka classes or a slightly-lesser resemblance to the typical 3x3x8" American heavy cruisers, and could perhaps be made to resemble some of the French and Italian 4x2x203mm heavy cruisers or possibly the American 2332x8" Pensacola class with a fake turret behind the superstructure.
Also, Graf Spee and Admiral Scheer were both Deutschland-class cruisers, and neither any Deutschland-class cruiser nor any vessel of comparable size and similar appearance was in service with any power other than Germany, as far as I am aware. As such, disguising one as the other cannot reasonably be considered an attempt to conceal the ship's affiliation or class. It might mislead Allied intelligence as to where each ship of the class happens to be, and if the disguise is not used all the time might give rise to suspicions that two of the Deutschlands were operating in the same general area or perhaps in concert, but it won't significantly increase the difficulty of recognizing the ship as a German Deutschland-class cruiser.
Anyways, I don't feel that this ship is particularly more suitable for service as a commerce raider than the Deutschlands were; outside of evading detection, a raider's best strategies to defeat interceptors or escorts while avoiding damage which may immediately or eventually cripple it are to be armed powerfully enough to rapidly overwhelm its opponent, to be essentially immune to its opponents' guns, or to be fast enough to run away before it gets hurt. An ~11,000t 30kn 2x3x210mm heavy cruiser with 5" (max) belt armor is none of these things to historical heavy and perhaps also at least some of the larger light cruisers except possibly the last, if its diesels allow it to lose potential pursuers before their steam plants work up enough pressure to let them run it down or at least open the range enough to force an endurance race. 210mm guns probably aren't significantly superior to 8" (203mm) guns in range, armor penetration, or explosive power, and it only has six 210mm guns whereas most heavy cruisers have eight to ten 8" (203mm) guns; its armor appears to be fairly comparable to that of American heavy cruisers from the Portland class onwards, some of the modernized British County-class cruisers, the French Algerie, and the Japanese Takao class, and not a lot better than that of several other heavy (and light) cruisers; and at 30 knots it's a good two knots slower than most other cruisers, though its diesels probably give it better acceleration and might give it better high-speed endurance than the steam plants of most other cruisers - assuming that they need to work up steam. To me, this looks more suited for hunting raiding cruisers or for engaging other heavy cruisers in a fleet setting than for acting as a raider. I suspect that this would fare worse against a heavy cruiser than Graf Spee did against Exeter at the Battle of the River Plate; with its significantly-lighter main battery, it's unlikely to put a heavy cruiser out of action as rapidly as Graf Spee did Exeter, and I feel that the larger main batteries of typical heavy cruisers would probably carry the day since its 210mm guns are only slightly heavier than the 8" (203mm) guns typically carried by heavy cruisers while its armor is only more or less comparable to that of many of the historical heavy cruisers which would have been its contemporaries had it been built. Raiders don't want to be in slugging matches, but the ship you've proposed probably cannot fight any other kind of engagement against most of the larger Treaty-period cruisers (and if the armor isn't heavy enough to allow a slugging match with heavy cruisers, I'd note that something like the historical Deutschland is probably better for rocket-tag).
You've made a good point, so I've changed the design to include four dual turrets.
Graf Spee, Germany Pocket Battleship laid down 1932
Displacement:
11,406 t light; 11,929 t standard; 13,181 t normal; 14,183 t full load
Dimensions: Length (overall / waterline) x beam x draught (normal/deep)
(624.79 ft / 610.00 ft) x 71.00 ft x (24.10 / 25.33 ft)
(190.44 m / 185.93 m) x 21.64 m x (7.35 / 7.72 m)
Armament:
8 - 8.27" / 210 mm 45.0 cal guns - 285.21lbs / 129.37kg shells, 150 per gun
Breech loading guns in turret on barbette mounts, 1932 Model
4 x Twin mounts on centreline ends, evenly spread
8 - 5.90" / 150 mm 45.0 cal guns - 103.55lbs / 46.97kg shells, 150 per gun
Breech loading guns in turret on barbette mounts, 1932 Model
8 x Single mounts on sides, evenly spread
Weight of broadside 3,110 lbs / 1,411 kg
Main Torpedoes
8 - 21.0" / 533 mm, 23.70 ft / 7.22 m torpedoes - 1.570 t each, 12.558 t total
In 2 sets of deck mounted side rotating tubes
Armour:
- Belts: Width (max) Length (avg) Height (avg)
Main: 5.00" / 127 mm 396.50 ft / 120.85 m 10.11 ft / 3.08 m
Ends: 1.00" / 25 mm 213.48 ft / 65.07 m 10.11 ft / 3.08 m
Main Belt covers 100 % of normal length
- Gun armour: Face (max) Other gunhouse (avg) Barbette/hoist (max)
Main: 5.50" / 140 mm - 8.00" / 203 mm
2nd: 1.00" / 25 mm - 3.00" / 76 mm
- Armoured deck - multiple decks:
For and Aft decks: 1.77" / 45 mm
Forecastle: 1.77" / 45 mm Quarter deck: 0.67" / 17 mm
- Conning towers: Forward 8.00" / 203 mm, Aft 8.00" / 203 mm
Machinery:
Diesel Internal combustion motors,
Geared drive, 4 shafts, 65,422 shp / 48,805 Kw = 30.00 kts
Range 19,000nm at 10.00 kts
Bunker at max displacement = 2,254 tons
Complement:
614 - 799
Cost:
£4.372 million / $17.487 million
Distribution of weights at normal displacement:
Armament: 772 tons, 5.9 %
- Guns: 747 tons, 5.7 %
- Weapons: 25 tons, 0.2 %
Armour: 2,973 tons, 22.6 %
- Belts: 914 tons, 6.9 %
- Armament: 982 tons, 7.4 %
- Armour Deck: 885 tons, 6.7 %
- Conning Towers: 192 tons, 1.5 %
Machinery: 1,931 tons, 14.6 %
Hull, fittings & equipment: 5,720 tons, 43.4 %
Fuel, ammunition & stores: 1,775 tons, 13.5 %
Miscellaneous weights: 10 tons, 0.1 %
- On freeboard deck: 10 tons
Overall survivability and seakeeping ability:
Survivability (Non-critical penetrating hits needed to sink ship):
25,690 lbs / 11,653 Kg = 90.8 x 8.3 " / 210 mm shells or 2.5 torpedoes
Stability (Unstable if below 1.00): 1.01
Metacentric height 3.1 ft / 0.9 m
Roll period: 17.0 seconds
Steadiness - As gun platform (Average = 50 %): 93 %
- Recoil effect (Restricted arc if above 1.00): 0.86
Seaboat quality (Average = 1.00): 1.85
Hull form characteristics:
Hull has a flush deck,
a normal bow and large transom stern
Block coefficient (normal/deep): 0.442 / 0.452
Length to Beam Ratio: 8.59 : 1
'Natural speed' for length: 28.76 kts
Power going to wave formation at top speed: 52 %
Trim (Max stability = 0, Max steadiness = 100): 50
Bow angle (Positive = bow angles forward): 10.00 degrees
Stern overhang: 10.00 ft / 3.05 m
Freeboard (% = length of deck as a percentage of waterline length):
Fore end, Aft end
- Forecastle: 20.00 %, 27.17 ft / 8.28 m, 27.00 ft / 8.23 m
- Forward deck: 30.00 %, 27.00 ft / 8.23 m, 27.00 ft / 8.23 m
- Aft deck: 35.00 %, 27.00 ft / 8.23 m, 27.00 ft / 8.23 m
- Quarter deck: 15.00 %, 27.00 ft / 8.23 m, 27.00 ft / 8.23 m
- Average freeboard: 27.01 ft / 8.23 m
Ship space, strength and comments:
Space - Hull below water (magazines/engines, low = better): 68.9 %
- Above water (accommodation/working, high = better): 233.8 %
Waterplane Area: 28,508 Square feet or 2,648 Square metres
Displacement factor (Displacement / loading): 137 %
Structure weight / hull surface area: 124 lbs/sq ft or 607 Kg/sq metre
Hull strength (Relative):
- Cross-sectional: 0.89
- Longitudinal: 2.77
- Overall: 1.00
Excellent machinery, storage, compartmentation space
Excellent accommodation and workspace room
Ship has slow, easy roll, a good, steady gun platform
Excellent seaboat, comfortable, can fire her guns in the heaviest weather
Carries 2 x Arado Ar 196 floatplanes