I have a 2013 3650 fl. The problem is the sofa's are so uncomfortable we removed them today. You could only sit on them 20 min and your bottom would go numb. I love the unit but couldnt deal with the sofa's. Once we took them out we understood why, we were sitting on plywood. Sofa has no springs of any kind. Now were at the delima of what to replace them with. Does anyone have any thoughts or idea's.