Can only assume that doing a better job than Frank is nigh on impossible - other than redesigning the rotorhead (!) or maybe using a 3-blade rotor. That seems to be the message so far.
For non-USA I would suggest that the lightweight diesel/Jet A1 engine comes asap. But there's the rub - the USA market isn't feeling too much of a pinch on the use of Avgas and Frank's favo(u)rite US dealers aren't shouting "gimme a diesel!"
Which p***es me off everytime I spend $150 filling an R44.