I'm trying to figure out the nacelles. The outer side of the left nacelle is exactly the same as the inner side of the right nacelle. They look strange from that angle. In some ways, they look flat at the top (near the front) but by the time you get to the rear of the nacelle, it looks more vertical. It's got a strange optical illusion effect.
Yeah, they are definitely different.
They are kind of triangular in shape... maybe these images will help.
Thanks for the comments, guys... the Io idea is great, too!