Interesting how manufacturers try to cut cost where they can. In our 2003 Holiday Rambler Endeavor, made by Monaco, there was a shower seat. When we purchased the Beaver, made by Monaco, no shower seat (how is a lady supposed to shave her legs?). We had the dealer install one as a condition of purchase. I know they went through the wall in the bedroom, but I don't know exactly how it is fastened. We have never had a leak or other issue.