The reason I ask is I have an opportunity to change out the 2 blade CSP for a 3 blade CSP for free if I agree to use my aircraft for noise tests as part of the certification process . I use the plane for off field landings so the higher ground clearance would be nice but the plane is slow enough without losing more cruise speed with the 3 blades, it's a composite prop and is supposedly lighter than the 2 blade one currently installed.