This is a really cool shipset modification, CGIBull did a wonderful job on these ships and I hope that you can animate the turrets and such properly and wish you the best of luck in the animating the turrets.

Suggestions:

- Particle Effects for ships:
I think that the ships while looking amazing I also think that with some properly placed particle effects would make the ships all the better, particles in mind are those that are located around the engines of each ship (as close to as possible) would make the ships even more amazing and be a wonderful touch.

- Starbase / Solar Stronghold: [NSC2]
The starbases are really good, im not sure if you have CGIBulls' Modular station pack but I think that a few modular stations and maybe a rotation of some parts (or additional parts styles) would make this mod pretty unique. A minor qwirk that the starbase shipset has is that it shares the same model for the 'Starhold' and the 'Defense Platform' if an additional model or different modular parts could be used to make the defense platform more unique that would be cool. I love the vertical version of the 'Defense Fortress' I think it might be better visually to add more vertical/horizontal differences in the star bases to give each platform/starbase upgrade a unique look for example the 'Citadel' would bee a good stepping stone for a vertical 'Solar Stronghold' model thats vertical and elongated with the larger part being towards the top and a narrower base addons such as panels.

EDIT: With later consideration I think that for uniformity sake that you should stick with the 'Defense Platform'/'Defense Fortress' vertical style of station for the 'Defense Station' my suggestion is replacing the 'Defense Station' with a mid-tier addon design of platform. So you can visually see progression from the 'Defense Platform' > 'Defense Station' > 'Defense Fortress' for each upgrade I would think it be best to add sections to the ship (Vertically) to show the stations getting progressively bigger in style in design.

With the starbse itself I think that the progressoion from 'Outpost' > 'Star Port' > 'Starhold' is perfect in design, where I see that a disconnect starting to form is with the "Star Fortress' I believe that the pattern of progression should follow suit with the 'Citadel' > 'Solar Stronghold' to progressively show that the station is being increased by design progressively. I consider the 'Solar Stronghold' kinda small for what it is now and think it should have 1-2 more sections to make it look unique in both size and shape.

A minor edit, but a distinction between the size of the 'Ion Cannon' / 'Annihilator Cannon' should be quite larger as it is housing a god class weapon instead of an Ion weapon. Just a small size upgrade would be sufficient to see the difference in both.

-Ships (NSC2 Suggestions): [Still in progress for making suggestions]]

- Battleship:
I think that a small scale increase for the battleship woudl make this ship more distinct from other ships for your fleet, currently the battleship is scaled at '@battleship_scale = 12.0' and I think that a size increase to '15.0-17.0' is warranted due to the ships smaller model size.

-Carrier:
I think that the carrier needs a large scale increase compared to the battleship from its current scale of ', I think due to the thinner model size compared to the battleship it needs to be increased porportinately to the scale of the battleship with a '2.0-3.0' scale difference to make the ship bigger in general (as its carrying tons of fighters and the small ship space would be disporportinate to its carrying mass.

- Colossus

The Colossus is amazing, the model is top notch, The size needs to be bigger than a size 25 planet so I would suggest making it Size 35-40. If you can animate the ship so that it roataes, retracts and expands the wings when firing then returns to a flight compact mode this model hands down be the best model in stellaris, props to CGIBull

- Megastructures

Some of the megastructures are not really in line with the Kurogame style/art so I made some for you if you wish to implement them into your ships/race mod that would be amazing and I would be appreciative. feel free to edit as you see fit.

Edit : https://1drv.ms/u/s!AlPYT4ERyRekmSuPYVFyEA0wuOAh