Has anyone actually broken a steering box?

I just noticed that Flaming River (and possibly others) advertise their manual steering box as being stronger than the stock one.

That sounds fine...but what the hell kind of gorilla would it take to break a stock one? Or...am I underestimating the strength of some component here?

Have you broken one? How did it happen? Is the upgraded box worth the extra couple hundred bucks over a (reman?) eBay piece?
fatigue is normally a factor. I've not broken an A body one, but I have broken one in a 78 powerwagon. Also keep in mind, reman'ed by who or what? Reman'd means they are re-using 40 plus year old parts and just replacing the wear items such as gasket, bearings, etc.

That said, I'd go get one of those smaller, light Borgeson power steering boxes