Ken,
What propeller series? and what boat and motor combination?
Profiling can help some, but believe it or not we change the pitch and cup
numbers for more gains than profiling. It is always good to try new stuff with
propellers, I have recently hit on some old propellers with different numbers.
It is a labor of love trying new profiles and new number combinations. Testing will
teach you the most about propeller modifications. It is the old dog new tricks kinda
thing for me recently.
Thanks For Reading,
Mark Sholund