Your SEP looks good, but you need to take some pictures with sunlight, since the flash is washing out some of the colors and adding funny shadows.
I don't want to seem picky, but you might want to add silvering to the sides of the Track guide horns, since they rub on the insides of the road wheels for more realism (picture from Prime Portal). If you already have, then it's just not showing in the pics.
Great work! Keep it up!