The right hand panel is held in place temporarily with screws and fender washers while the next panel is slid into place. The molding trim between them will make the final curve work properly. Note that I have not removed the ceiling to wall wide plastic trim to do this ceiling. I am going to take it down later and either paint it or replace it. It is the only part of the job that I have not done yet. I am still deciding what to do. The point is, you do not need to remove it to do the ceiling replacement.
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