Having said I can't recall if this was the Athena Plateau or the Mercury Plateau, There to accompany the Vulcan Plateau I think I resolved in my head that this is in fact the Mercury Plateau. It's a uniform square [not taking into account the staircase] which better reflected the planet Mercury, whereas the Athena Plateau is/will be a long thin hill better reflecting the bow Athena used in her hunting. Look, have you seen the misplaced symbolism in star constellations? These are as good a reasons as any!
Anyway below is the black undercoated hill with the modular socket capped off with a door and the steps faced with another new buidling material
Cable ties! Sure they're 4.8mm which means they don't quite cover the 5mm foam card but the little step adds detail and 'more detail is more detail', not to mention the many little grooves from the tie grip. I'm sure there's plenty more ways they can be used, even en masse as a whole wall texture and as I got a bag of 50 for £1 they're cheap as chips.
Here's the newly undercoated Plasma generator in plugged into the socket. More on that soon.
And a marine in place for scale.