Tubular upper arms-I feel lucky tonight

a gusset isn't needed. the welds were bad on those arms. the way the arms broke right down the weld tells you it wasn't welded properly. the gusset would have broken and done nothing too if welded like those arms that are pictured in the original post.

I'm not saying a gusset would have saved those particular examples. What i am saying is that it would be general good engineering practice, considering the large loads to use a gusset -otherwise, why would have most other more respected brands have done it? If all the welds are done properly, gussetting can only make them stronger and stiffer. I know i'm not alone in thinking this.