Today I continued with the base. The point is that weathering and finishing of the guard tower is not possible without base. Once washes are applied, fingerprints become the worst enemy of modeling, so you get the idea: With a base, there is always something to touch.
I used ready-made wall finishing plaster and glued balsa to the sides of the model, then sanded it in shape. This is now all setting, and the tower has been fixed in place as well. There is an electric cable running through the side of the model because I added a little light to the tower.
So what is next? I cleared my bench to start constructing a little vehicle that will go with the diorama. In between, I will apply soil texture and start applying grasses and other flora.
Happy this one is evolving!
Take care, chaps!