It is, isn’t it? I had no idea either, with my elderly set of Ping i3+'s. No shaft stickers. Could’ve sworn they were R’s, with how easy they were to turn over. Nope! Evidently Karsten was not a fan of R-flex for most. Shrug.
But those JZ whatever-they-are in my i3’s felt very different than either the S400 or X100 I tried at a Callaway demo day I wrote about here, a bit over a year ago. I regret not buying more from the guy besides the wedges. Turned out OK though.
It does take some time to adjust!
I will say, and I will promptly post my experience with the Mizuno shaft thingy, when I finally find the time and $ to try the damned thing. (Not having a Woody’s Golf to try, down the street like Jon here, where you’re paying Woody to make that judgment for you. See, Artisan.)
I’m very curious to see what it thinks I should in for irons and woods.
Because let’s face it: fitting can be expensive, and not thorough. And if you find a thorough fitter, then it’s really expensive. Accordingly, we’re all trying to find shortcuts to trying everything from six different shaft mfgrs, and now comes the heads! (Hope you packed a lunch…) I would hope that tool could provide a, “Huh, I would never have thought of that. Let’s try it!” or two.