The LHS lad was wondering about making stiffer blades. I'm sure that would increase performance, but where might a person get such a blade? Then I got thinking about your clipped blades. A shorter blade will spin faster and make the same lift as stock. A short blade won't clack. A short blade has less flex - flex per inch over less inches = less flex. So a short blade will give equal lift without the flex. Or maybe I'm just nuts. I'll start collecting broken blades until I have a set to trim. I'm pretty hard on blades. No clack, but I keep trying to thread needles and I'm not that good. And ceiling fans are really hard on helis.