Ooh, I had though about that and concluded there wasn't any unnoticeably change possible (I had already accidentally posted a second banner with the black paly and chevron reversed), but thanks to your comment I took another look at it and found another way to tweak it unnoticeably! Thanks!
Edit: Ack, but it seems the system can tell if banners with different recipe orders are identical, so what I thought would work didn't.