At the moment I take my shot and connect (5:35) Flat's got about a 100mph speed difference in his favor, he's under 300mph now and I'm under 200mph against a newer/ less experienced opponent I *MAY* have been able to try and follow him up a bit. If the A6M kept turning and completed the loop I may have been able to get a shot as the nose flops over the top, however against someone like Flatiron I'd expect he'd make the right move and do a spiral climb or some other sort of maneuver to try and keep me on the rope till I hung myself. In this particular fight if I missed that shot my only real option would be to dive and extend yet again and try to reset the fight.
The P-38J or L would be playing by the same rules and restrictions I was dealing with yet would have a little easier go at it because they have more engine power.