Just bought an LM instinct from someone here. The string on it currently is Head Fibergel. The ball just flies. I am used to a heavier head light racquet (PK 5g). When I demoed my friend's Instinct, the ball stayed in better, but still had a control issue, but I played so well with the racquet (he was missing half my shots--must be my lefty spin) in ways that I can't with the 5g, that I decided to buy one. I have had arm soreness (not particularly elbow--more like shoulder and hand) so I don't want a harsh string. I did post on the string board but didn't get many responses so I thought I'd try here. How do you make this a more control-oriented racquet so you don't have to hold back on your swings? What string/tension do you use? (I'm a 4.0 mostly doubles player, female).