Thank you all for your kind and warm words, they mean a lot to me. THANK YOU!
George, the Norman vane sights are from an upgrage set from HGW.
You can take them for the early planes, the mid and late guns have had a normal sight, because the vane sight tendet to rotate to the left when the pilot flew a hard right curve and viceversa, so the gunner had to aim behind the enemy plane.
Manni