i hear from steve neil, a modeler from all series of trek that the big E does NOT have any grooves in the primary hull. matt jeffries insisted that was the case. no panel lines, no extraeous details, nothing. the ship was to look as clean as possible. that way it was as modern looking as they could get back then. don't know if there were any grooves on the bottom in the original, but just thought i'd let you know what i understand. thanks for sharing, though great model.