I would be curious of any alternatives you come up with.
My main interest would be improved performance!!!
One problem I would anticipate is when it's overhaul time for my machine in a few years, Robinson to my knowledge will only sell an overhaul kit, with a new set of their Rotor Blades, as a way to make things difficult for you probably.
I guess I could sell those factory new blades to someone else, but I'm guessing I would probably take a $$$ hit, and then still pay whatever premium for yours, so it might be a tough nut to swallow.
Seems like so many R22's have gone overseas in the almost 2 decades I've been playing this game, I'm assuming you would be able to deal with whatever the foreign entities require, for their certification process?
Good luck and hoping to hear more on this!