All Cougars (actually, this year, I think all Keystone trailers have a floating rear wall) now have a "floating rear wall". That said, whether yours "moves in and out" more than another similar model trailer would be something you'd need to do in a "side by side comparison"....
The way the rear wall is installed is to "hang" I at the top, then install molding around the perimeter, cut holes for any windows/vents/attachments and install those, the tail lights, running lights and shore power cutout/assembly (if it's on the rear wall).
So, essentially, your rear wall is secured "around the perimeter" and at each "thing" that's screwed to the frame through the rear FILON sheet.
I'd suggest taking a walk around the dealer's lot and press on the rear panels of other similar trailers. That way you have something to compare to your own trailer.
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John
2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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