Well, this is probably taking detailing to ridiculous lengths, but once I was hired to repair a retired F-4 pilot's 1/32 Revell model of the E he flew in Vietnam. One of the things I was hired to do was replace some of the armament, and add some new stuff, including Sidewinders. So I did a little research, which included going out to the local ANG base and looking at some real ones. The AIM-9s had wires stretched across the exhaust end of the missile, looking like the cross hairs of a gunsight. The purpose was to hold the rollerons on the fin tips in the stowed position, and when the missile was fired, the hot exhaust burnt through the wires, causing the rollerons, which stabilized the thing in turns, to pop out to flying position. Long story short, I used my own hair to replicate these wires after drilling out the exhaust end. Sure looked good if you knew it was there. Moral: There's often more than just a hole at the end of a missile.