Select connected lines/surfaces

I’m working on a project just now that requires me to manually offset complex surfaces (Rhino’s Offset Surface can’t do it), trim them with upscaled intersection lines, and then join them. Because this involves complex shells it’s not easy to select all the planes that touch in order to do this. An option to Select - Connected would be a tremendous time saver here. Maybe this is already in Rhino 6 and I can’t find it, but if not I suggest it for Rhino 7.
thanks /Chris Yonge

can you post an example? I don’t understand what are you looking for.