Can't see the reticle of my ReVi in the 109

[Sokol1]

Well, in Oleg's games usually you are able to see HALF of Bf-109 reticle.

Try using "Lean to gunsight".

See in Options > Control > Views keys - for default "Shift + F1" is assigned.

Or perhaps you gunsight reticle are dimmed down (option for some planes).

Look in Options > Control > General for keys to

Increase Gunsight Illumination
Drecrease Gunsight Illumination

Some VGA, notedly notebook ones cause trouble with reticle light in Il-2:CloD, but since you see RAF ones, indicates not be the case.

Sokol1