After the sheepswool was covered with a polyethylene foil to keep moisture out, I did affix the original interior trim panels. The wool insulation has plumbed up the space between the ceiling and the panels, so it was a bit hard to get those again in place and affix them with the original clips: the distance between the trim and the wall had increased in some parts. But with a reduced number of clips the trim still does stay in place well. The LED strip at the rear which provides a great bright light when the rear door is opened, was affixed with cable binders to the ceiling trim.
