You've already set the Surefit adaptor down to 8.75 degrees?

If your clubhead and not ball speed is 112 mph, the shaft is probably not right. For an 11 year old/5 generation back driver, buying a new shaft would be more than a used driver (910-913-915) with a stiffer, heavier shaft. You can then swap shafts to trial. A fitting for a shaft and the new shaft might as well be part of a new driver that could eliminate the fitting fee and also best match a driver/shaft to your swing.

Hey man, at 112 mph swing speed you are getting into tour speed territory. I would suggest a graphite design shaft. They run on the pricy side, but the shaft will last you for years. At your speed I would suggest an XS (extra stiff) or a Tour XS.

GD basically comes out with one shaft per year. This year its the HD. 2020 is the XC.. 2019 was the VR... 2018 was the IZ.

I have heard from speculation that some shafts play more fade/draw biased than others, but the IZ is a lot ball flight and doesn't have draw/fade bias.

Iv've attached a chart for your reference.

You can definitely try out the IZ shafts at a Titleist Thursday.

If the IZ is still too high for you, I would go with the TP.

Each shaft has a 4/5/6/7 series with different flexes in between. Check GD website for weights

I would like like some ideas for re-shafting my AP2 716 irons. 60 years old, swing speed is around 90, single digit handicap. I would like to stay away from graphite. I have been looking at the Project X 5.5 regular flex.