Actually, this option exist for the Ka-50. You can adjust the crosshair height at discretion. Zoom center and aiming center are uncorrelated but in dogfight you are looking on the upper screen zone. And 5° upper for aiming are more convenient. There is a reason why the F-16 gun line is pointing 3° pitch up.
Actually, the grass runway isn't modeled. There is three runways in triangle in the middle of the airbase. I found a picture from IGN Geoportail, the French Map Office from the early 50's. https://www.geoportail.gouv.fr/carte