[ojcar]

Maybe in future it would be possible to add new planes from scatch (with proper and well researched FM and DM), but at this moment it can be very dangerous to touch the DM and FM (of course, DON'T TOUCH THE FM OR DM OF THE STOCK PLANES). I think those kind of experiments could be good after BOB released and the bulk of onliners goes to BOB series.
I personally would kill someone for a proper Ki-44 or Ki-45...