To add to what JRTJH mentions about debris, etc., on the slide roof, a slide topper also collects that same debris much like your regular awning does. The topper still has to be checked and cleaned before it is retracted into its roller. In this sense, it doesn't really save you from having to perform that chore - it just moves the location from one area to another.
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2008 Cougar 5th Wheel 27RKS
2005 2500 GMC Duramax
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