I want some extra spin on my groundstrokes and have never tried a poly so I decided to research a little. I've read that polyester can cause tennis elbow and even cause enough pain to disable people from playing tennis. Since I am less than 18 years of age and not fully grown, will using polyester strings inhibit my ability to play tennis in the future? I have read to string polyester lower as it would help with the stiffness and give better control/a longer playability period. However, I'm willing to not use polyester if I won't be able to hold a racquet when I grow older. I use a Volkl PB10Mid which is arm friendly with its flexability rating and I was planning to try some Dunlop Black Widow first, as I heard it was a soft poly. Will this be alright for my arm or will it damage my body in the long run? Thanks.