Wow...I am very interested to hear these details. A 3-blade direct drive prop at 12" diameter must be very light on the pitch. Even most 2-blade Martec's for A-4's I've researched should be 12 x 5 or maybe 12 x 6.
I am too cheap to lay out the $$$ for a Max prop but they are very cool. I wonder why they did not think 2 blades were sufficient. Isn't the whole point of a Max prop is that the blades rotate around on the hub to give almost the same thrust in reverse without the walk??