I picked up a PF-9 a week ago and took it out to shoot, the snappiness of the recoil is a little much, so I really don't feel comfortable putting it into the ladies hands. Now I was wondering if I could purchase a heavier Wolf recoil spring made for the P11 and put it in the PF-9...I figure that if the guide rods are interchangeable then maybe the springs are as well, any thoughts??