Kiwi prop --- feathering
I was in Martec''s office two weeks ago picking up my reconditioned prop, and saw the kiwi-prop literature sitting on the office desk. I asked about it, and the gal said that they had sold one, and were considering becoming a distributor. There was some disagreement between her and one of the other folks that work there about the durability of the prop, and the potential for breakage by impact with debris. I told her I couldn''t imagine an impact that would shatter the flexible kiwi-blades that wouldn''t bend a metal blade. And the kiwi-props come with a spare blade, just in case, anyway.
If you want one, I believe Martec will sell you one, and although they may give you a pitch toward their own product, I think they''re a pretty honest bunch.