Glad I looked at the article. I went for one thing and found something even better that I wasn't looking for. His "rear focus" technique is interesting and seems to be a good way to pull off what I was wanting to be able to do, more or less switching instantly from One Shot AF to Servo AF without going into the focus/drive menu. I know you can assign the function of switching Servo and One Shot to the DoF Preview button, but I don't like the mechanics of that, my fingers aren't quite long enough to pull it off smoothly or without pulling my index/trigger finger off the shutter button.