Hi,
I would also still try the <font color=red>vicegrip test </font color=red>that was suggested above [can't see by who now.../w3tcompact/icons/frown.gif]
IF you can bend them with visegrips, then you are taking a chance. They may hold fine now but give out later when you least expect it.
It never hurts to be too safe.
I envy your accomplishment at making that modification and hope in the spring to get a welder of my own and do something similar!
Bill in Pgh, PA