Yes, frames should be designed to flex a bit in travel. But looking at that frame design depending on a bolted-on wall for support leaves a lot to be desired in mt engineering opinion. There should be some backer plates added at some of the known high stress points. Thes would add minimal weight and minimal cost.
I just think Lippert builds frames that are too light and added to that is poor welding.
Ken
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2023 Cougar, 2022 F150 EcoBoost tow max Lariat 4x4 Off Road. Former full-time RVer
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