Re: harmonising the guns
The quote from some of the better pilots during the Battle of Britain was that "400 yards rewards the poor shot with an occasional hit while punishing the good shot with a lot of misses". Eventually policy was changed to let pilots set their own harmonisation range (and many had been unofficially doing so well before then). Most of the high scoring aces of the war didn't open fire until they were less and 200 yards from the target - many from 100 or less which risked a bit of left over airplane in the face but guaranteed enough hits to kill.
Biting the hand that feeds IT
