That's GREAT! Some are stiffer than others; that's the only "gripe" I have on JXF is wood variation. However, to be objective, it's probably equally likely that others have as much variation, who knows?

I know if the prop you're using is difficult to untwist by hand, you probably will have good performance in the verticals. That's where the "untwisting" of a prop really shows.

I'm still gonna maiden my Obsession / DL 50 with the PT Models 22 x 8 N, just to see what happens.