I too am looking at the Luga.
Currently I have a 70" ground adjustable Warp Drive prop. with the metal leading edge. Never flew behind it.
My 912 big bore will need a new prop and possibly a change of gear box ratios.
The guys at Zipper have the engine and recommended both a gear ratio change and the two blade Luga.
A friend who has a series 5, 80hp. rotax and the warp drive 3 blade says to stick to a three blade for smoothness.
I'm no bush pilot and most of time, at first, will be local airports, grass strips and cross country work. I don't have
enough experience with any of the prop's for a 912 to have a valid opinion.
I have no idea which way to go but the current prop I have atm will have to be changed.
Anyone that has a Luga let us know how you like it.