Aluminum strut rods on the street?

What's the fatigue rate/life of that aluminum vs. steel? Is the thread hole heli-coiled? What about the threaded end that you can't do anything about other than run a nut on it?

I still think this is a bad place to try and save weight. People run aluminum wheel adapters too... smart? Not to me.

BTW, I believe JD was selling three materials for his adjustable strut rod, now he has two... and aluminum is not one of them any more. I wonder why.