The wings aren't really that dark (my light box is boxed up). After all my complaining and reluctance, it turned out OK. I still need to Dullcote all of the Tyranids, but that will wait until I finish the rest.
I ended up pinning the wings, and it was definitely not the cleanest job ever. I just home they don't nerf these models in the new Codex, because they are a PAIN to put together.