Yes; you'd need to copy and paste the entire Tabula Rasa layout layer to your own layout layer (that's actually how we're going to implement it as a layout which "extends" off of Tabula Rasa, except that once it becomes official, we'll tell the system to do the copy-pasting/duplication for us.

The problem with not copy-pasting, is that the new layout layer is not aware of the Tabula Rasa layout layer in any way.