Portal - Hammer Logic Rocket Turret V2

While this version can actually target enemies through portals, it is painfully prone to seizures. There's also an issue where both the rocket sentry entity (used for animations and aiming) and the invisible tripwire turret stuffed inside it (used for firing projectiles and the targeting laser) fire a rocket, which is why at some points in the video it looks like the sentry decided to explode. Still haven't figured out a reliable fix...