I have noted that the rear corners were fitted between a closing panel and the rear side panel. I thought for a moment I could open up the seam and let it slot in but fitting it from the back and then getting in a gap aint gonna happen! So now Im thinking that I could cut some of the closing panel and then use my Snap-on pneumatic joggler to put a step in the rear corner so it sits more flush with the rear side panel. Does this make sense? Lots of really good looking jobs on the forum but I wonder what works best?