Over the last two days I poured the base for the Rear Guard diorama. The floor will be "tiled" with some mosaic patterns on it.
Here you can see the pencil scetch (as seen from the blast door/steps).
Over the better part of two hours I engraved the lines, using the scribing tool visible in the back.
There's a small video on this matter available on Youtube: http://www.youtube.com/watch?v=xYUn32_7_MM
As you can see, the main logo isn't done yet, but my fingers were pretty sore last night :-P
And this is how it will look assembled.