In the FWIW category all the stress in that assembly is located between the shock mount and the ball joint. The trailing portion of the arm that actually broke, goes to the frame pivot and carries next to no stress compared to the portion between the ball joint and the shock mount.
I think the real problem here is a lack of government control! We need legislation passed that requires weldments and their various components to be a non stressed portion of the suspension system, a full background check should be required before the sale of any welding rod and certainly registration (or is that castration —
) of all welded suspension components would go a long way to eliminating this type of problem. Seems like something ought to be castrated though ...
Sadly, it appears that we have been let down, yet again, by our fine elected representatives
— simply the best that money can buy!
Ed