Update:
Sorry everyone for the errors that were present in the scales for RAOBF that I had made over the last week.
Making scales for the AOBF tool turned out to be far more difficult than I originally thought. All the different screen sizes, cameras etc.
Makman has been a huge help, teaching me how the scales in the 3d game work and how to set and test them. He has also provide us with a scope mod complete with scales, rings and optics at the historically proper fov, 38 degrees.