I have the APT steering guard as well, just bolted right up there easy as, no fuss, no modifications or swearing or anything. Nice piece of equipment.
The track rod however is not shielded by the steering guard because it's behind the front axle - stick ur head under the car and check it out. Seems to be the weak point under the defender. Even with the APT steering guard, I bent my track rod. I'm replacing both the track rod and drag link with upgraded APT units.

