would you normally run your .82 at 10300? I've tached my .82 at 10400 with 15% coolpower but i run it around at 9400-9600. I was thinking about using 30% and i wasn't sure about how to prop it but if the 15wx4 gets 9lb at 9700 i think i'll be happy. I wonder what kind of thrust you would get from the 14x6 if you dropped the rpm to 9700..i'm not asking you to do that but with a 600 rpm difference it only makes sense that 14x6 would pull more considering how close they are in pitch and diameter