Nice video with Mark Kroll ( sp)
Scroll to ~ 5:30 and listen to the former production manager mention, rough interpretation.... "our engineer's design and tell Lippert what to build, they don't engineer it we do, so if we didn't put in enough outriggers, it's our fault"
https://youtu.be/cV0OZv0bCgc
Also at 22:30 , for a minute or so, discussion about the front slide -corner cracking is discussed, in regard to workers not installing the coach to the pinbox right.
At 24:30 he mentions using a magnet to locate steel strength plates in the event you want to attach something and take advantage of the extra bracing.
Interesting statement, with respect to the recent document about frame damage, imho
Allen