I replaced the loveseat/bed with a dual recline loveseat last fall. Installed
THIS. As mentioned the backs come off so it slipped thru the coach door with no problem. Hard mounted to the coach floor with lag bolts thru the frame. As Halmfamily posted 'I wish we would have done it sooner'.
If you go thru the images posted by reviewers on the Amazon page I posted a review on 10 Oct 2016 which included images so you can see what the seat looks like unboxed without the backs and installed in the coach.