Dred, comparing your two screenshots.
A. It does look like the uprights are to close to eachother. In the RL cockpit, they are just outside of the corners of the main gauge area, in the game cockpit they are inside the corners. Actually, to explain it different, IRL, the inside edges of the uprights line up with the edge of the main gauge area, and in game the outside edges of the uprights are to the inside of that line (not even lined up).
B. Are you sure you have the same perspective as in the RL shot? It seems to me that your perspective may be higher, which means that the bottom curve of the front windshield doesn't blank out the right MG bump. It is hard for me to compare the two though, since the IRL cockpit does not have a gunsight mounted.
C. As far as the width goes, you've got two different widths. Lets say forward width (oriented along the nose-tail axis), and side width (wingtip to wintip axis). In the in game shot, it is tough to tell them apart (at least for me. The rear uprights appear to be to thick, but that may be an illusion because of where the camera position is. Forward width on the back uprights actually appears to be to skinny, unless I'm not looking at the right line.
D. I really don't have that much truble reading the gauges in game.
E. I think the forward uprights are suffering from the same thing the back uprights are, in that it is tough to tell what is "forwards" width, and what is "sideways" width. I *think* the forward width may be to thick, by looking at the right upright compared to the left upright.
G. That is the intake, it may be missing on the RL picture, I'm not certain.
H. I think your pic is coming from a different perspective than the RL pic, which makes it look as if the cockpit is to smushed, up and down.
Overall, I think your picture may be slightly behind and above the RL picture. If you look at the brace on the rear upright, in the RL pic, that is all you can see in the upper right. In youyr pic, you can see a significant slice of the upright itself. I think the perspective in game needs to be moved forward some. If you compare the ammo count bars (i didnt even know 109s had those!) in the RL pic, they are not blanked at all by the bottom lip of the cockpit, they are in a shadow that is being cast by it. In your pic, the top of the bars are being cut off by the lip, which leads me to believe that the viewpoint is higher than in the RL pic.