It is so weird with my rackets because when I play with 3 4/8, my rackets becomes so stiff. I got no power... feels like I am playing with a pan. But when I wraping an extra overgrip, my rackets tends to become more soft and I get power. But the problem is that the handle is to big for me then. 3 4/8 feels so comfortable but something is happening with the racket and the strings feels hard strung with the smaller grip. What could be the problem?