As suggested by a friend of mine at Reallusion forums, I switched up the camera angle of the Bird of Prey decloaking, to include the shuttlecraft in the background. Yes, both ships are to scale...so even against a BoP, the shuttlecraft is tiny.
I based scaling generally off of (whimper) Star Trek V. I scaled the original Constitution class to the Refit Enterprise, then scaled the shuttlecraft to the classic Connie, and then scaled the Bird of Prey to the refit Enterprise...so all ships are to scale to the best of my knowledge.
But this is just the TOS shuttle and the Klingon Bird of Prey. If I do say so myself, the cloaking/decloaking effect turned out really good....thanks to some creative compositing and color manipulation in Movie Edit Pro. I think there's still room for improvement, but for now, the cloak effect looks pretty durned good.
http://www.youtube.com/watch?v=hckQr4ZXh58