Maybe I can take you up on that offer too. After watching the film a few times I spent some time in the K4 this past weekend.
https://www.mediafire.com/?daavw4guu5d70lo
Yes I know my aim sucks 
The first thing I noticed was your flap usage. I think that was the biggest issue during the fight. If you would have gotten your flaps all the way down on most of your roll overs you would have got inside of him. The next thing I could see was your use of Vertical. I didn't quite see enough nose up movement to a roll over. Instead of rolling over horizontal try to nose up a bit higher, do an aileron roll, get more of your flaps out, and then loop back down.
at 3:38 - 3:50 you could have used a bit more vertical going into the first roll and then you should have got all your flaps deployed. You may have been able to get the shot. Then you go into another horizontal roll which your flaps should have already been out, and you may have gotten that shot. Instead the flaps went back to normal position and you can see how he almost got a shot on you. This is because you didnt have your flaps out and you went more horizontal in the roll instead of vertical. You have to go straight up, use aileron to position, get flaps out, cut throttle, and THEN loop over. You were going too fast.
At the 4:00 minute mark and again at 4:30, you should have completely deployed all your flaps (instead of 1 or 2 notches) and used that to roll over with a lot of rudder as you were going right. Also during the 4:30-5:00 mark, you should have used a lot more vertical immediately and snap rolled to the right (do a right vertical roll) instead of horizontally rolling to the left, you could have cut inside for a shot.
I think your biggest issue vs this fight was your flap usage, Vertical loops, and direction of the loops, If you would have gotten more flaps ( I only saw 1 or 2 notches out and used more vertical instead of horizontalyl always rolling to the left, you would have been able to cut inside his loops with a sharp right snap roll. You rolled right one time but didn't use enough flaps or rudder to get the nose around. I think you could have been a bit more aggressive performing the rolls aswell. Also using more of a vertical loop will allow you to get a better deflection shot on the opponent.
Hopes this helps a bit, only had a few minutes to watch and write this, so I thought Id mention a couple of key points I noticed.
You got em to auger soo good on you for that!!

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