I recently purchused a new callaway fusion driver with a stiff shaft and ive started slicing the ball alot more . Mostly when on the back nine when im getting a little tired . should i return it for a regular shaft like on my 3 wood and 5 witch a never slice . ive also noticed im not hitting the ball as far when im not slicing too except when im fresh like the first couple tees and i can kill it then .. help