Oh my! Where do I start? Let's see.. First, you must learn to turn coordinated, then you must teach yourself to be gentle with the stick, she doesn't like it rough and do NOT lose speed or you'd be dead soon. You cannot outturn the P51D in a horizontal turn, so what's left? Exactly.. use the vertical, just as you said, better climber. But remember that the P51 is a better diver (just a bit). You need a lot of hours to master the Dora. Remember that tactics is what makes you win a fight.. always. She's the best energy fighter that DCS has to offer, so use it to your advantage. AI will not make you better, as you'll develop bad habits. Go directly online and you'll quickly learn, probably de hard way, as we all did. See you in the skies! P.S. I personally love Dora.