Recoil f4 in sub zero, what other shaft?

I hit the 10.5 sub zero well with Recoil f4, numbers were good but fitter wasn't receptive to trying other shafts, (I'm sure he's right) but I'm just wondering what compares before I spend $500. 94 mph ss. slightly outside in.

Need to know a few things.

What was your launch angle?

What's your typical ball flight.

What are you trying to improve on?

Usual miss is left, a little outside in but fairways mostly, spin was under 3000 I think launch was around 13. Lower spin and more distance (11 yds average) than my F6 with red tie. I took the sz to my course and hit several balls off a par 4 tee by my house and the L M numbers proved out. Really just wanted to know what compares to Recoil F4, I hit the Hzdus with green lettering at demo days but no numbers. At mid 90 ss and spin do to cutting across a little the 10.5 sz with f4 is probably great, just checking because there are so many shafts available even if it came down to looks. Thanks!