I replaced my wood 60x34 prop with a new 67 inch two blade koolprop with scimitar blades. I flew my kitfox with the new prop today and was pleased.
The wood prop was dynamically balanced and still shook the windshield compass so badly from cavitation I could not read it. The engine would not rev past 2800 even in a dive.

Now there is no vibration at all and much quieter. I have the pitch adjusted for 2800 static. It now climbs at 1200 fpm at 70mph and will rev to 3150 level flight

The wood prop cruised at 2250 rpm at 75mph
The koolprop is now 2400 rpm at 75mph but much smoother.

I flew for 1.5 hours today and still need to re learn the landing approach. The new prop is like a brake at idle and I lose airspeed much quicker. With practice I will figure out my finals.

My top speed is about the same but with less load on the engine. I'm very pleased with my purchase.