My good God! Where on this earth did you find such a treasure trove of information like this? I thought I had bragging rights when I was (very) fortunate to gain access to the RAF's sole Defiant & took several detailed photos of both the front cockpit & rear turret interiors. That is, until this was posted. Great job! The literature really helped to clarify a lot about the inner workings of the turret.
As an aside, I didn't pay much attention to the silhouettes of those P-47s until you calked it out. Good question!
Gary