My driver swing speed is between 90-96 mph. Right now I have a Superfast 2.0 in Stiff flex (45gram wgt.) cut from 46.5" to 45". This seems to have helped a lot since I'm now hitting the sweet spot more often with tighter dispersion. However, taking off 11/2 inches has caused it to be even lighter and more whippy (if that makes sense). Which I don't like at all. I recently tried out the 910 d2 10.5 with the bassara w 50 in regular (50grams) and liked it, but I'm wondering if I would be better off in a stiff flex with the same shaft. Can you help me with this?