I have tried a bunch of poly strings and I love using it, but I have been afraid to try it in both the mains and the crosses. So when I put a multifilament/feel string in the crosses, they break very soon. If I were to put a full poly bed in my racquet, what's a good recommendation for a type of string that would be easy on my arm, because I'm a junior and can't risk ruining my arm. Technifibre black code? Big Banger Original? Help me out!