Is there anybody can help me to answer this question: What is the best string for Wilson K Factor K Surge in term of Power? I bought one Wilson K Factor K Surge few days ago, string with Ashaway Crossfire 17 Kevlar String (24kg), but the feeling is that it"s a bit harder compare with the Head Liquidmental S4 I have played before with the same string. I bough 01 more yesterday and string with Babolate Porhurrican Tour 17, same 24kg, but the power is still not enough. Anybody have use this rachket please advise me what the string I should used???