a pretty weld isn't always a strong weld and a strong weld isn't always pretty. just saying, tig welding isn't always the strongest type of welding. I'm a certified welder and i can tell you from experience that all these arms dont really have the greatest of welds on them. i bet if you took any name brand arm and took a cut sample of a welded joint and compared it to that of a cheaper arm the weld prob has near the same amount of penetration.
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if you havent been in a small plane its worst, cause your eyes and brain say we are moving and your body says oh no we are not. eyes and brain go asshole we are moving, cant you see? body says fuck you we are not moving at all. so they fight and fight and eventualy your body says, you know what fuck you brain, see if you can stop this!! then you throw up.