Love your colour modulation! Nice contrasts on the oranges, and even on the whites (although exaggerating the shade to highlight blending on the whites more would help it stand out, especially against the white photo background). I would also try some TMM techniques on the steel areas... the bits on the front look rushed and not as slick in comparison with the rest of the model. All in all, a really impressive model... looks like something straight out of an anime movie (Appleseed?) or computer game.