Just string it tight. If you are using the kps88 then we assume that you have a long swing and like to swing fast. I have strung mine from 72 lbs down to 48 ( with fresh polly, go around 67 ish if you use all syn, I like mine 61/64 with a hybrid.
Have tryed out 50 53 55 57 and 60, Honesly...