This is from while ago. We installed two gang box (BC2104-LRB-2) on a finished drywall. But this time instead of regular F-clips, we used CI820-DX. http://tnb-canada.com/en/fichier/whatsnewsousmenu/ci820dxsalessheet_E.pdf Here’s how it turned out: Categories: Commercial retrofit Tags: CI820-Dxf-clipsretrofit Leave a Reply Cancel reply Your email address will not be published. Required fields are marked * Name * Email * Website What's on your mind?