When we custom build a golf club we spine every shaft BEFORE the club is assembled. Spining is a process of flexing a golf shaft to reveal (on a consistent basis) where the shaft bends each time in the golf swing. This is a very predictable position; the shaft will flex and rebound from the flexed position in the same direction every time. This position is the neutral bend position (NBP) and the shaft will resist moving from this location when flexed. We feel the orientation of this position to the clubhead is the foundation of custom club building.