So, I bought the Karakal PU Super Grip DUO for my HEAD Power Helix 10000, but I'm not sure how to put it on. And I'm not sure if I should use it as an Over Grip or a replacement grip. It's my first time buying the Karakal PU Super Grip DUO and it seems different then the other grips I've used before. I'm a noob! Help! Thanks.