Yeah, I noticed the lozenge covering the struts as well. It's something I'm not aware of seeing on other aircraft of this era. Maybe they just weren't large enough to require them? Who knows.
I'm still not 100% positive what the shiny areas underneath should be- I'm leaning towards metal plates (as metal was used in the forward fuselage). I'll have to check on the cutaway supplied by "The German Giants" to see what's right inside there. I'm
imagining a bomb bay, but again, I'm not 100% sure.