I want to replace my rusted out sills with RHS.
Like so.
So a few questions for those who have done this. (And yes, I searched. A lot

)
How did you attach them? Where they welded strait to the panels or was plate welded in and then these welded to the plate or ??? (I'm assuming that no one braces them to the chassis.)
Was there any reinforcing done?
How have they lasted? Any cracking or deformation of the body?
Thanks
Hayden