We have a 2017 21RBS with a "soft" floor. Just seemed to come about later this summer/fall. We dropped it at the dealer's this afternoon. Soft on the area(s) described by the OP. Adding anything on top of the existing floor is pretty well defeated because of the slide.
Will keep an eye on this thread and post any news.
__________________
2020 F150 ECO SC & 2019 Cougar 22RBS HT
|