sdandrea1 no reason you couldn't pull and Flo after finding the correct f.a./setting. But then this is a fitting issue more than it is a spine/nbp/Flo issue. Fitting the loft by adjusting the f.a. is the wrong way to go IMO. I want the driver sitting correctly to suit my eye (slightly open) when it's naturally soled. I don't want to monkey with the f.a. to get to where I like it by turning it before addressing the ball. Adj. drivers don't throw out Flo, quite the opposite, you now have tons more variables where you wouldn't ever know if Flo made any appreciable difference, every adjustment is an adjustment away from Flo and also a f.a. adj. At the same time. What I did with f6 is find the f.a. and flight I liked the most, pulled, flo,d and reinstalled. Critical to get the f.a. correct with the right loft,not getting an ill fit f.a. just to get to a certain loft.
Oh yeah, did I see a diff after flo=no, but I know it's done and nothing is left to chance, and all whammies are ruled out. Only on a poorer quality shaft does Flo make an appreciable difference, I've seen it on some shafts as recent with an Apollo black steel (Hireko,s stepless shaft painted black with a gawdy logo). I aligned none of the shafts (no nbp or Flo) and went logo down on the set to avoid seeing any of that gawdy logo. All were fine, less the 7i, which I could not turn over to save my life and most shots hung right. Pulled shaft, found nbp and aligned and walaaa. No more rights and could turn over right to left. It can absolutely make a difference, but as I stated it's only on a poorer quality shaft, which may simply be a QC issue, and ultimately I'm guaranteeing no whammies!