I'm fairly certain that DoA didn't come out until after WildBill, at about the same time that Moe introduced so-called dispersion into the gunnery model. The F1s could still plink your Spad13 like crazy from well-past 300 yards, making the rest of the WW1 planeset obsolete. From what I remember 50% of the players were in F1s 90% of the time.