Hmm, sounds good. To be honest, I'm not sure where to go next with my group in Burst. I seem to have this problem a lot, I can come up with a beginning and an ending, but have troubles when coming up with everything else. :P
Anyway, you mentioned upgrades to my airplane? What did you have in mind? My idea was really simple, more advanced missiles, a particle cannon instead of a machine gun, and can transform into a mech like the Flags.