I like your idea of using the original box as a background :) The alternate came out very well, I like the "fin" on the aft side and the model's playable feats. Had you also managed to build beyond the original "Atlantis" theme, you'd have gotten more than a 3 from me.
So I tried to make an Alternate Set from this myself, and it's pretty hard. You preformed very well with the build. Take Lee's advice about the photography and work with it. I award 3 points to this creation.
These are tough builds - I have tried a couple of times to restrict myself to the parts available in a set, and I am never happy with the results. Nice job on this one, I really like the folding out aspect. I did dock a mark due to the out of focus pics, and you get two (2) points. In addition, on pic with the box in the background is good enough, it is always nice to go to a plain background for the rest so it doesn't detract from your moc. Lee.