[Rain Man]

Yes, there are modifiers. Pilots get better at landing, bombers get better at hitting the target, etc., after they've completed ten missions. Gunners get better after they get five kills.

Now, in our game that's all a bit muddled, because these missions have already been run. Over the past few years, I ran missions for 23 planes using those rules, but instead of just repeating those planes' fates here, I randomly shuffle the mission results. What that means is that the above adjustments don't necessarily correlate to individual gunners, pilots, etc. You'll all get better on average, but you may be an ace one day and a rookie the next. There was no way around it other than to just repeat the missions verbatim.