Good job, Lightonthehill. Very detailed, comprehensive explaination of the procedure. I bought a good quality Craftsmen 1/2" drive click type torque wrench 25 years ago and I have used it hundreds of times on all my vehicles. A good torque wrench is a must for any do-it-yourself mechanics tool box.
I have taken the wheels off my 04 Max dozens of times since I bought it and I RELIGIOUSLY torque the lug nuts to 80 ft. lbs. every time I put em back on. I have never had a problem with front end "shimmy" or warped rotors.
I would just like to add a couple of notes on the subject:
The total amount of torque is not as important as the consistency of the torque. Most threads have a "tolerence" or range for torque specs depending on the diameter and the thread pitch (like 75 to 82 ft. lbs.) In other words, if you are within this range, you are good to go, as long as every nut is the same
If you are using a "click" type torque wrench, it is important to return it to "zero" when you are done with it. The mechanism inside the wrench is spring loaded and if you leave it "on" all the time, the spring will weaken and the wrench will loose it's accuracy.
As far as a torque pattern is concerned, I find it easier to imagine the 5 lug pattern as points on a star. Start with any lug nut, then move to the farthest point on the "star" until all 5 nuts are torqued.
Oh, and if you own one of those "flex" handle torque wrenches (with the pointer and scale) throw it away or give it to somebody you don't like very much. Those things are junk!