that green piece chills on the back underside with a mirrored piece with it. Those to are the only green on the entire set though, aside from a bit of lime on the front sticker. A little out of place, but not that noticeable.
Having just rebuilt it, I quite like it. The folding wings are super smooth, thanks to those black and clear air pump things, which are only found I this set as far as I know. And the wingspan is massive in the open position, rivaling the gunship even. If you wanna display it in the open position, all you need is a decent sized plate (Or brick in this case), which the bottom wing can rest in, like so:
I really don't have any major gripes, it's pretty solid.