mancini tube upper control arm failure....

engineers have designed some of the biggest disaster known to man. In a lot of cases the at home guys just understand this stuff and how it all works together. It's hard to explain. You have to see it in action to understand I guess.

As for the welds go. It's no different the a weld on that bridge you drive over everyday. Or the building you work in. A bad weld is a bad weld. Even if your using all stock stuff you better be under there checking things out. Just had a friend find a stock upper arm with a crack in it. The stock stuff is far from bullit proof too. And let's not get off subject here. The failure in that picture is a bad weld. Plain and simple