I think what he is saind is that when the guns hit you, they all hit you at the same time. So, instead of one guner putting a couple of rounds in you, they all do at the same time and at the same spot. Convergence can be adjusted in one fo the files I think. In any case, if you ever watch any gun cams from Germans attacking bombers, you will see that they totaly ignored the buffs guns. Also, a few 20mm in the tail gunner position should atlist disable it, if not killing the gunner. After all, those are the same 20mm that can kill ack guns by exploding somewhere near them and kill you when you shoot a target thats too close to you. Bottom line, buff guns == total BS.