Smaller reticule for RAF fighters?

[fireship4]

You can't make it smaller, and if you could you would break it as a measuring device (unless you knew what size you were changing it to). The sight in game is calibrated (100 mils?) and will stay the same size independant of view setting due to how a reflector sight works. You can change the width of the secondary sights through the wingspan/distance dials below the sight though, to allow for measurement against differently sized opponents.