Thanks for all the kind responses. I realize that the pics I took apear quiet dark. I'll try to post some better ones later on.
So Far I concluded that there is a minor mistake in MPM's cockpit build up. The bulkhead that holds the radiorack and the ammo box for the C-stand, will not fit as the ammo box sits in the way of the floor, making it impossible to line up the cockpit floor with the bulkhead.
So I think I will cut out a slot so the ammo box will slide in the cockpitfloor. Since this will not be visible, I'll go ahead with this.
If this does not work, Then I'll have to cut the Ammobox in two and glue one part on top and the other to the bottom of the cockpitfloor in order to get things aligned and getting a good fit of the fuselage halves.
I also think that the "tail end charlie's" office will give me some grief as well. MPM kind of oversimplified the end of the stinger. Pics show that this was a rather complicated construction on the real aircraft in order to create the necesary azimut for the Mk 151-20.
And since I'm not gonna put the cannon in, I'll have to improvise a bit regarding the detail on this part.
As you can see in the pics of the He 177 A5's tail, there were actually some kind of "brushes" added on the "moving part's" of the tail.
I never noticed this before...Now I have to come up with a somewhat realistic solution to create this in the 1/48th scale...