The game dynamics have changed since then.
How you remember is different from how it would play out now.
Now we have 3x bombers performation, fighters can't open fire on bombers until twice as close (no more "hit bubble" coding).
Bombers would take losses, sure, but fighters would lose just as many. That's the problem with recycling very old scenarios. You've gotta adjust them for the times. Make tweaks, etc.
EDIT: As long as it's 4 frames I'm all for it. I don't like 3 frames -- too short!