LOTR Mumak Diorama Base

After a hard working and long weekend, I can proudly say, that I've finished the base for the Mumak Diorama.

Here it is:

And this is what it looked like, before the original Mumak base was integrated:

The entire diorama is made of styrofoam, also the rocks. After the raw modelling it was covered with plaster an sand.
The oval base was then set into the hole and the gaps also filled with plaster and covered with sand.

Since the oval base was already completely painted, I had to be very careful not to damage any of the paintwork, which was very difficult.

But I think the result was worth the effort. What do you think?