No problem,
Corsair MkI damaged:
Yak canopy frames before:
After (also note odd placement of metal vs. wood bullet holes):
Re-2000 gunsight. These are the three views possible. I used a house to help keep my aim steady. I paused the game and took snaps, the only change being the view (shiftF1)
Bullets high and to the left (Centered view)
Bullets high (Gunsight view when the thing worked

)
Bullets low (New Gunsight view)
The last shot shows the "best" view, but it should be clear that this is not quite right. I have to aim higher or pull more lead than what is normal. In order to hit a non-maneuvering target (yes, even at convergence distance), I actually have to aim above it, or just shoot when it's being obscured by the sight mounting (neither of which is easy).