redmeesblue, I’ve got the following structure:
Editor (Flexible Content) > Elements (Flexible Content) > Page Element (various field layouts)
The first level, the editor, uses a flexible content element with one layout that serves as the container for the page elements. Then, the elements field inside it uses a flexible content field that contains the page elements as layouts.
I’ve done some more complex UI customization to enable modal windows and resizable containers, but I think you can still get the dragging to work without all that.
