I need some help figuring out a driver problem. I purchased a nakashima 380 driver and have a Harmon GXS at 44.5 inches, SW is D2. My swingspeed is 105 to 108 and all I can hit with this club are hooks. They are long but hook about 15 to 20 yards. My current driver is a Titleist 975J with a Harmon FZS - fully inserted at 44.5 inches and D4.5 SW. I hit that club great - work it either way, high or low. So what if any ideas do you all have ?

I need some help figuring out a driver problem.  I purchased a nakashima 380 driver and have a Harmon GXS at 44.5 inches, SW is D2.  My swingspeed is 105 to 108 and all I can hit with this club are hooks.  They are long but hook about 15 to 20 yards.  My current driver is a Titleist 975J with a Harmon FZS - fully inserted at 44.5 inches and D4.5 SW.  I hit that club great - work it either way, high or low.  So what if any ideas do you all have ?

The shaft is too soft. Since you inserted that FZS full, it stiffened it up alot. The Harmon shafts are softer, so you probably need the X. Did he tip the shaft at all before he installed it in the Nakashima?

Greg, the bore depth on the Nak is 1.5",. you need a X, :D , what loft do you have again?