Looking good mate, in all honestly I wouldn't be overly worried about the details dependent on the type of diorama you may not show to much of it as due to how wet and shelled up the battlefields where the more often than not dug there own graves as they tried to move along I'm just glad they didn't give up on the idea or we'd have a lot less things to build kits of
I also think you've achieved an amazing "metal" look about it.
It really "clanks"!!! (tehehe!)
And a diorama yet to come I gather? Fabulous!
My preference - WW2 RNZAF & Pacific Theatre, Allied & Axis, ETO, Mediterranean, AFV & figures
I enjoy doing research