I have heard many roomers about this Laser prop. The Falcon rep in Greece on the 700RSR Falcon put a 25" pitch x 14 1/4 it on a Evinrud Fiht 175, raised the engine by about 13 more cm (i.e. 1 notch up) and he says he's got 65knots
out of it on an empty boat just 60-70 ltrs of fuel on it. He also put something between the engine mounting and the transom bringing the engine leg inside more rather than outside to avoid cavitation at the start.
No I do not know about the 65 knots but if he's done it well the boat is bloody fast and at that speed dangerous if you have people on it. He aslo said that at that speed is dangerous and you need quick thinking and reaction.