I finished inserting all the plastic card bottoms.
To build up the crater rim of thrown up earth, I glued in some card board strips.
I had to fill some gaps and create some kind of smooth transition. I have a box of Milliput that starts drying up on me. So I'd better use it up before it dries completely. After I peeled the dry skin from the darker of the two rolls, the Milliput was still workable.
