Very nice looking ship! I second Vorgra here: 
The engine sticky-out-bits. Are they intended for vectoring thrust, or to separate the engines so it isn't as easy to cripple the ship's movement?
The side pylons... They look like airlocks to me?
I quite like the paint.
And I really like knowing the scale of things. A quick estimation based off prefabs makes me want to say ~200 long?
I havent really figured out where i want the airlocks yet, the end of thoughs pylons have engines on them to allow for quick roll to get guns on target. i might try a bit off fiddlyness and see if i can put them on the ends. might work out well.
as for the sticky out bits, its mostly just for looks, but it does make the angle off attack on the main engine cluster a bit more narrow as a side effect.
as for size, its 145m, not too big, but still has alot of room inside.
Once more another great ship... i want to see a massive ship done by you 
i have had a few ideas, but man is it tiresome once you go past the 300 meter mark to fill in the insides, and i love to fill in the insides. I miss being able to place prefabs with the line tool
