Weld Penetration
Like Curtis said ^^^^^ "It is a little harder to tell the penetration of a MIG weld also".
Uhhhhhh . . . . , I would NEVER trust a shallow penetration MIG weld on any Suspension or Roll Cage weld, PERIOD.
Let the T-shirt welder guys on TV use it on sheet metal, should not get anybody very hurt.
I still have several clients that will not allow MIG welding on any of their pressure vessels due to this very fact.
44 years of this stuff.
Take care, K