Hi everyone; I'm new to the Titleist family,finally got tired of the annual TM gimmicks..I'm the proud owner of the 913 4h, 913fd18 and 913 D2 9.5 all with Bassara 50 R shafts. Here's my question. I'm thinking of tipping my driver shaft to lower the launch angle and spin, also my SS is around 91which puts me in limbo between S-R. I don't know how much to tip ( 1/2. 3/4 or 1" ) if at all….Any opinions ? My hdc is 10 and I'm 60 ish….Thanks, Joe