I would personally have added a bit more bone on the turret weapons, just to differentiate them from the hull they're hovering over - to show that they're there just a bit more.
I'm sure it's easily visible in real life, but when you look at a tank at a glance your eyes should be drawn to what are the important bits easily. You do that very well with your differently colored gems on the serpent shield generator, and the underslung shuriken cannon springs into the eye fairly well too. The twin-linked scatter-laser less so, I'm afraid.