Very nice vid. Was that a 109 you were tracking?
For me the music is too chilled. I would go for that music during track and trace then when target lock I would go for something with a bit of umff, BoB OST or any war theme from the 60s-70s
I would also try replicate the DF in realistic for some external views. Wiling to help with this.
Overall though a great film, fantastic to see such creativity on BoP
Edit: I would go with the late great Michael Kamen for music. Either suite 1 or 2 from Band Of Brothers for comtempary. Myself I would pick anything by Ron Goodwin but for this Film I think this is fits: