910 vs 913

I have a 910 driver and I work at golf town so I know the main specs for my length and shaft flex but, I feel that I am not gaining the maximum yardage I can. Is this forged face and a 9 gram weight over a 7 gram weight in my 910 gonna make a difference I am currently using a aldila 60g for a low torque shaft for my fast swing speed. But I wonder that if an after market shaft could possibly increase my flight and help maintain my low spin rate of 2900