also been a while since I read the book. Not sure my comments will be applicable
A lot of aerodynamic studies and modeling has moved to quad copters and new concept like the Racer, Raiders,
Also a lot has changed with the cockpit, even low cost (bell 505) get dual garmin and integrated performance calculations and other helicopter-only features in there
Also composite it used to be reserved to a fenestron shell now it is the whole aircraft
Also slanted fenestron of the H160 how does that affect longitudinal stability do you get more noze down on ptich up?
The ethernal question of the pedal work with the fenestron like the Cabri has been discussed a lot
underslung vertical stabilizers seem to be hot these days too
just ideas