I might've lost you in my last post so let me underline the important part:
At 6X zoom:
Range = (Target height / Attack Scope "Degrees") x 345
Range = (Target height / Obs Scope "Degrees") x 3450
What frustrates me even now is that the AOBF wheel itself is a bit wrong. In the default position it seems perfect but if you rotate the wheel for a 10x multiplication of the default values, the bottom part of the weel is missaligned
.