
The thing you will find with most graphite shafts is that they have more than one spine. One may be dominant but no guarantee. With graphite it is best to FLO imho, despite what JB says. As to whether you need the Pro version to handle the larger diameter butts, well if you intend to go with spining then the answer is yes, if you intend to FLO graphite the answer is no as you can skip the spine finding step. Each to their own.