Very nice fight...a classic rolling scissors which the 38 does very well at. I really enjoyed watching and analyzing the film, you both did very well. Here are my observations:
You only have about 10mph on him at the merge but it looks like he pulls harder going up and gains some angles on you.
At the top of the first immelman, he actually has a position advantage on you (he's behind your wingline). I'm not sure why he rolled away from you at the top. If he had rolled into you I think he could have had a belly shot or at least been able to follow and jam you at the top forcing you down with him behind before you could complete a second Immelman.
Your first crossing shot definently cost you as you already know but it was a reasonable opportunity.
The rolling scissors was classic; however, it doesn't look like either or you were very consistent in keeping your lift vector behind the other but the few times you did it made a difference in position advantage. I get the impression that Bosco tended to relaxe a bit in the vertical, probably trying to conserve E but that also let you gain. By time 2+30 you've clearly gained angles on him and have several turns with your lift vector behind him and you eat him up. He's feeling the pressure so he tries to redefine the fight with a pure loop but it doesn't last and you go right back into the rolling scissors.
You are carrying, on average 10 to 20mph more than he is through most of the fight. This is translating into better turn rate across the bottom because you're closer to corner velocity than he is. It appears it also gives you a bit more control over the top. Also, even if you fly an identical flight path, your extra speed lets you close the distance on him.
I see hardly any mistakes throughout the fight, just instances of slight differences in technique that have given you the edge which allowed you to slowly but surely gain on him. I'm not exactly sure what Bosco is doing at time 3+28. It could have been a moment of indecision or, judging from the yaw rate, too much rudder resulting in a slight departure but immediately after he attempts to force an overshoot and reverse. Unfortunently for him, you don't have enough speed to carry you through an overshoot and he ends up reversing directly in front of you putting you squarely in the control zone. It probably would have been better had he ruddered over hard right to try to jam you and force you into a mistake but it's hard to say. He went from feeling pressured to becoming fully defensive with that move but you can't fault the decision to try something different. This can be one of the toughest decisions to make in a knife fight...when to stop doing what's not working and try something else.
Overall, a great fight by both. It's obviously you guys are very closely matched and it was only slight differences in technique and a couple of bad shot opportunities that made the difference.
As far as what you could have done better I'd say the biggest thing is that you really didn't keep your lift vector behind him enough. Most of the time your vector was right on him but you can clearly see times in the fight when you had your vector behind and it helped you out. Perhaps the fight would have ended sooner if you had been a little more consistent here. This is not just a technique to use in a rolling scissors but in all ACM. Picture a 45 deg cone extending out your opponent's six with the point at his tail. The part of the cone from about 200yds to 800yds is the control zone and where you want to work yourself. Once you're in the control zone use high and low yo-yo's to maintain an e advantage and react to his break turns. It's almost impossible to shake someone in the control zone unless he has way too much closure or doesn't know how to yo-yo. Most people just pull directly at their opponent so you end up with a series of close passes, especially if their goal is to take any snapshot opportunity they can create. While it may result in a shorter fight if successful, or be necessary because you're defensive, if not successful you're not really advancing your cause.
v/r Mace