And I doubt they make 150 every flight despite all the work leading up to the event. Making 160 with an RC job should be less difficult than 150 with a ukie I would guess.

When I get to my Profi .061 sometime this millenium, I have some 4.25 x 4.5, 5, and 5.5 CF props to try out on that little jobbie that's waiting for servos and Rx now. But I'm probably packing more drag than you so the higher pitches may be useless.

MJD