Hi I play for highschool team and im 6 feet tall and weigh 160 lbs. currently, im using my o3 hybrid shark mid+ and ppl kept saying my racket is a girl racket and felt light. so, i decided to add some weights inside the butt cap and i did. it feels a lot head light now, and i guess im hitting better serves, but somehow, im getting pain in my arm, its not tennis elbow. between my elbow and my shoulder. its not really bad so i can still play tennis but it really does hurt and bothers me. am i not strong enough to use my modded racket? should i take off the lead?