Pedro,
How about a pic from above? One that get's the entire dio from above?
I don't know much about the Flak's, though they are indeed wicked beasties!
The pics are kinda blurry, but I like the retaining walls for the emplacement. Can't tell....but I'm assuming they are individual boards?
It seems "proper" that the figures have dirty "whites" on their lower legs (pic 2 looks good (the fig with the binos) with the dirty "backside"). Thinking about it, they wouldn't wear their helmets all the time, so maybe some dirt/mud on top of their helmets?
Agreed...needs ammo crates. Something else to consider may be a little more snow at the edge of the pit where it meets the walls.
All in all, looks sharp to me!
Mike