Phaser is right Eclipse, your Bussards seem too big. 
This isn't my model though, it's C2X/P81's model 

I may rescale it a little though.  As far as the panelling, I'm using the Sovereign's colour scheme...that might be why it looks a bit darker lol.  I may just ligthen it just a bit, not too much.  Then again, I may just darken the hull (not the panelling) a bit to kinda match that photo...Then again, I might also add more panelling similar to that beside the armour. a darker grey like on the Sovereign.  This isn't finished y'all 

EDIT:  Also too, it could be that there aren't very many Aztec panels too.  Either way, I'm still working on this 

DOUBLE EDIT:  Ok, I just looked, there seems to be more paneling like on the Sovereign's outer edge of the saucer.  I feel if I add that it might make the armour look a bit lighter 

.  I'm gonna see what I can texture in in the next couple of days!  I'm taking a LOT of artistic license with this thing 
