You sure your not following me :-]
Your close to right... I do think I can improve on it a little though... Thinking of a 14X4 or something like that... This does weigh in right at 8 pounds dry.... Nice thing about the .70 though is a .91 will bolt right in... Same case etc and the weight is almost the same... I still have half the throttle left which isn't producing much change in speed etc... This tells me there has to be a better prop for this setup... I can do a big loop etc no problem. Stall turns run out of verticle rather quickly though.. Maybe I am just used to overpowered Extra's....
Take Care
Roger