Actually it was a hideously bloated underpowered behemoth that could have been easily wiped out by a fighter from before the romulan war but anyway...
BTW Sandman, those 2 humps are the equivalent of the large cuboid hump on the top of the D7 engineering hull, if you look at Masao's D2, D3, D4, D5 and D6 you can see it gradually evolves into that block, but it's not the impulse exhaust, on the K'T'inga it's actually the shuttlebay, the impulse reactor on the D2 is where you already have those yellow glows, I would suggest doing it like on the schematics, the front black like an intake (I know it's not really) and the back, black with the grey hump in the middle.
The textures are a definite improvement on the D5 ones IMO but they seem to fed-white to me, I would suggest you select all the basic grey aztec and use the brightness tool to lower it to a much darker grey, much darker, but the pattern looks nice and fairly subtle, very nice work on that.