The system with the Chevy MG doesn't seem possible with the Hanomag, because the Hanomag gunner doesn't have a large, flat truck bed to maneuver around on.
That weird arm thing the MG is attached to for the rear hanomag mount, can the arm be moved around? If so, it should be simple enough to position the arm somewhere where the MG won't clip through it if the field of fire is enlarged a bit, right? Or perhaps somehow limit the traverse so you have to physically tip the MG and maneuver it around the arm so it never clips through, but can give a better field of fire? Like, somehow limit the traverse of the MG to not lower if the "Arm" thing is in the way, but allow it to move over and around it?
Like:
..........
..........
....xx....
...xxxx...
The MG could move wherever a dot is, but not where an "x" is, because that's where the "Arm" thing would be. I don't know if it's possible, though...
Or maybe make it some kind of double mount, where the Actual MG is on a basic pintle mount, but using the WASD (or the Arrow Keys) moves the arm, making it kinda like the Lafette is right now, just mounted on the ass-end of a halftrack and with no scope. The MG still wouldn't be able to clip through the arm, but the arm could be moved, thus moving the "can't clip through here" zone and increasing the overall traverse of the MG.
I don't know, I'm just spouting out some ideas. I'm not sure how this would work with the soldier model, though...